PDF malware analysis — malicious · baacf0ef532e6f3b

MALICIOUS

PDF

3.5 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 8451179cfd916bb16f6af9319b3089c5 SHA-1: ffab7071290cd52d65f3d4b17d50717fbbe6ce77 SHA-256: baacf0ef532e6f3b2f85c749fc37a9aa0723938be44c25c9ea759168e7b3ae84

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious JavaScript T1071.001 Web Protocols

The PDF file contains embedded JavaScript triggered by the OpenAction, which is a common technique for exploiting PDF viewers. The critical CVE-2007-5659 heuristic indicates the use of a specific vulnerability involving `Collab.collectEmailInfo` and JavaScript eval, likely to download and execute a second-stage payload. The presence of deobfuscated JavaScript streams further supports this. No specific family could be identified.

Heuristics 7

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)
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `9af501d17848536135aa63c0caf8cfaeba19e9b4c455b4402695844a671b0084`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	13327 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`numeric_charcode_stage_000.js` `ecdef1d0c9612ae3cb360c425ed5fce2b2f5bc68d10fa52b93400544ad13d63d`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x445	4044 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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