PDF malware analysis — malicious · 2f0370512040c747

MALICIOUS

PDF

12.5 KB

MD5: ff7f2bbaa3c7265960f8d196654f9199 SHA-1: 824cc0da26986ac4b5f58cd393180fedc7b30984 SHA-256: 2f0370512040c74785381ff297ca00fb9ae28a56c4e75096d6417e74f5fa0772

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, triggered by the CVE-2007-5659 vulnerability via the Collab.collectEmailInfo function. This JavaScript is further obfuscated and deobfuscated into multiple stages, indicating a downloader or dropper mechanism. The primary intent appears to be the execution of a second-stage payload, likely downloaded from a remote source, although the specific download URL is not directly present in the provided evidence.

Heuristics 4

Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `1847af0a099665b6ac45af66402e56ed64237a1b287618ee3d6643267fda6f35`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	343 bytes
`legacy_pdfkit_stage_000.js` `1a9f88260d5ed99d9aef8a34844bad13a66d8e1e7f9584ab7513067c58d2b18a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	12297 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `9b567ed3e05eb448b9cc65e6c80ed969f9adf0d1b32ab5b39625a69ff3c9c7ee`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	5003 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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