CHFI Mobile and Malware Forensics Practice Question
This CHFI practice question tests your understanding of mobile and malware forensics. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which mobile forensic acquisition method is MOST likely to retrieve deleted text messages from an iPhone that was not jailbroken and has no passcode?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Physical acquisition via forensic tool like Cellebrite UFED
Physical acquisition (A) creates a bit-for-bit copy of the entire flash storage, including unallocated space where deleted text messages (stored in SQLite WAL/SHM/journal files) often reside. Since the iPhone has no passcode, the forensic tool can bypass the lock screen and access the raw NAND, allowing recovery of deleted records that logical or file-system methods cannot reach because they only copy allocated files.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Physical acquisition via forensic tool like Cellebrite UFED
Why this is correct
Physical acquisition recovers full flash including deleted data.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Logical acquisition via iTunes backup
Why it's wrong here
Logical backup may not include deleted data.
✗
Manual acquisition by browsing the device
Why it's wrong here
Manual acquisition only recovers visible data.
✗
File system acquisition via AFC (Apple File Conduit)
Why it's wrong here
File system acquisition may recover some deleted files but physical is more thorough.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that logical or file-system methods can recover deleted data because they access the file system, but in iOS, only physical acquisition reaches the unallocated space where deleted messages persist.
Detailed technical explanation
How to think about this question
On iOS, text messages are stored in an SQLite database (sms.db) with Write-Ahead Logging (WAL) and rollback journals. When a message is deleted, the record is marked as deleted but the data remains in the database file or in unallocated pages until overwritten. Physical acquisition tools like Cellebrite UFED use a low-level bootloader exploit (e.g., checkm8 on older devices) or DFU-mode extraction to read the raw NAND blocks, enabling recovery of these remnants. Without a passcode, the device is not encrypted at rest (though iOS still uses hardware encryption, the key is accessible), making physical extraction straightforward.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the CHFI exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CHFI question in full detail.
Mobile and Malware Forensics — This question tests Mobile and Malware Forensics — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Physical acquisition via forensic tool like Cellebrite UFED — Physical acquisition (A) creates a bit-for-bit copy of the entire flash storage, including unallocated space where deleted text messages (stored in SQLite WAL/SHM/journal files) often reside. Since the iPhone has no passcode, the forensic tool can bypass the lock screen and access the raw NAND, allowing recovery of deleted records that logical or file-system methods cannot reach because they only copy allocated files.
What should I do if I get this CHFI question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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