PDF malware analysis — malicious · 29440bbc6de97125

MALICIOUS

PDF

12.3 KB

MD5: fc2142d10bd49b26bd8d73b302754983 SHA-1: 1694f8ffeafada51de017e7873970c58f1531a7c SHA-256: 29440bbc6de971254e11d7cfd7717a3799d9e1695c2db47b2fa788b273f144f3

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by heuristics as exploiting CVE-2007-5659 via the Collab.collectEmailInfo function. Two deobfuscated JavaScript files, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', were extracted, indicating a multi-stage attack. The primary function of these scripts is likely to download and execute further malicious content.

Heuristics 5

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)
ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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` `6f60a1053baafdc578f85eae84a2dc6d16775fbd66240d82cbfb7b4f4ff4e90a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	295 bytes
`legacy_pdfkit_stage_000.js` `23f7f106a7ffd473429c45d4e42569000b8c84fcc88a07b62628ffaac84cb237`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E9	5256 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `c847f8ecbfeb7955a18a27f2ff987eafac927c68f220a548c4e0def340b2419d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E9	12471 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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