PDF malware analysis — malicious · 57febd09c22f3d0c

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: b6b9edb0722d1fc3fcf25d65dd3edf19 SHA-1: d5e01568eef8f8cad242aa99859df75d112d55cd SHA-256: 57febd09c22f3d0cc1b856c9ae28b9f6166425ad3b90e33da85b0ee6c387c4e9

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.001 Malicious Link/Document

The PDF file contains embedded JavaScript triggered by an OpenAction, which is a common technique for exploiting vulnerabilities. The critical CVE_2007_5659 heuristic indicates the use of `Collab.collectEmailInfo` to decode and evaluate JavaScript, likely to download and execute a second-stage payload. The presence of obfuscated 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` `fdd7c5d06c1a7bc7824c5edbbde63a573855e5c178ca5378e3070f7682e926fa`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	13251 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` `be0aa2c43b3cab6d88c9dc4cef2450e6ce4f22ccacf41378a71e898d01542401`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x445	4020 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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