PDF malware analysis — malicious · 3f9b7bdf76e88992

MALICIOUS

PDF

3.0 KB Created: 2010-11-30 90:60:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 541b836c4e08bb298f07333aa41d4ae8 SHA-1: b5a540d69e75ade991253d5d456a6e4985a12734 SHA-256: 3f9b7bdf76e88992a45afda9c4599f3fdf1c132c6021e3038b0908c8556b4269

158 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript and triggers an OpenAction, indicating an attempt to automatically execute code upon opening. The critical CVE-2007-5659 heuristic firing specifically points to the use of the Collab.collectEmailInfo method, a known vector for exploiting this vulnerability. The presence of an extracted JavaScript file further supports the malicious intent. The script's exact function is obscured, but the combination of these factors strongly suggests it's designed to download and execute a secondary payload.

Heuristics 6

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. (matched in decompressed stream)
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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.
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `fe14afc36dd2e279f5ad35a3f58d91f3328f1f9d5b3e4b34602b56022dda4a60`	pdf-javascript-stream	PDF /JS object 13 at offset 0x363	3243 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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