PDF malware analysis — malicious · 44a2cbfd1b1eefcb

MALICIOUS

PDF

2.7 KB Created: 2008-08-06 01:42:27 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: a55ce81ebfa1d2aa608c0b643b9ced05 SHA-1: ba123cc208f9cc67d2ccaf28b0e1ee6c3ea0e503 SHA-256: 44a2cbfd1b1eefcbc0be56961eef2ea807d71f2040d3dc24ada8df43a1572dcb

278 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.002 Spearphishing Attachment

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 related to 'Collab.collectEmailInfo' strongly suggests exploitation of a known PDF vulnerability. The presence of an extracted JavaScript file further supports the malicious intent. The ClamAV detection confirms this file is recognized as malware, specifically 'Win.Trojan.Agent-34667'.

Heuristics 8

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)
ClamAV: Win.Trojan.Agent-34667 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-34667
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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` `f5b80a51cc1e977c427675662b9d3c7195d38843834fe44d5d36288c24076080`	pdf-javascript-stream	PDF /JS object 13 at offset 0x36B	2654 bytes
Detection ClamAV: Win.Trojan.Agent-34667 Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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