PDF malware analysis — malicious · 2999f5524e2cae8f

MALICIOUS

PDF

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

MD5: 9160d00681e81d7d565ce79a0f1f3430 SHA-1: 9742f3dae0130a8bd76a9d34b02b0b8bc2d56287 SHA-256: 2999f5524e2cae8f67a87f4941637930d90e33f94e7d93e99029952cdaf00a17

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File T1059.007 JavaScript/JScript

The PDF file contains embedded JavaScript that is triggered by the OpenAction feature. The critical CVE-2007-5659 heuristic indicates the use of Collab.collectEmailInfo with a numeric character-code string decoded JavaScript, which is then evaluated. This suggests the script is designed to exploit this vulnerability to execute malicious code. No specific family could be identified, but the attack pattern is consistent with PDF-based exploits.

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` `1bf8f96b6afdde6d22a5ece837f9467f22be9fcb58fbac88efdad8dd0e2bc563`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	14011 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` `608da0a09bc8b63d687f96882a76b186f95e4d8893e8191d423b5dad46ec7204`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x445	4260 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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