PDF malware analysis — malicious · badcf4e01697d805

MALICIOUS

PDF

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

MD5: 3134c24c25432194f6f8c8ccf7373d31 SHA-1: c7c25c0d821e596c9a0c3ecba37bac4aa7d7a7c8 SHA-256: badcf4e01697d8057687a70927bbf3cfd2d16d086ba39202464d60b8dbc04c44

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF contains embedded JavaScript with multiple eval() calls, indicating obfuscated code execution. ClamAV signatures confirm this is a known exploit, specifically 'Pdf.Exploit.Agent-35587'. The ML classifier also strongly flags it as malicious. The JavaScript is heavily obfuscated, but the presence of eval() and the ML/ClamAV detections suggest it's designed to exploit a vulnerability within the PDF reader to download and execute a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Exploit.Agent-35587 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35587
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.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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` `e896c15d08fd7b0af35a5427069dfbe0e4b1bd2e9f862c83295d49926a88b475`	pdf-javascript-stream	PDF /JS object 13 at offset 0x392	6089 bytes
Detection ClamAV: Pdf.Exploit.Agent-35587 Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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