PDF malware analysis — malicious · 2b4d784e25c44a7b

MALICIOUS

PDF

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

MD5: e40042be182369d2a10808ba247304e8 SHA-1: 9cddc44794d4b3167bef2b73de11dba4d521bf5e SHA-256: 2b4d784e25c44a7b0abf13b303a7369d481af696c86a1cf442dc1a51c53ee82b

210 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF contains embedded JavaScript with multiple eval() calls, indicating an attempt to obfuscate and execute malicious code. The ML classifier and ClamAV detection strongly suggest this is a malicious exploit. The extracted JavaScript file, 'javascript_obj0013_001.js', is the primary artifact associated with the malicious behavior.

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` `109c2a5978e1d3f691a70324588a64a0e5767cc37bdf7273f6be14da836f307d`	pdf-javascript-stream	PDF /JS object 13 at offset 0x389	5898 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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