PDF malware analysis — malicious · 2b88de455e876a45

MALICIOUS

PDF

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

MD5: cb4f1757d78e5d086c78e9fc59f53cd2 SHA-1: ccbae24f19c2d9f9d537763ad6fb21fc287de4b6 SHA-256: 2b88de455e876a4506535f5a00d6e9b43a3c2e24f61af5f14e0227d39cc93a04

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL due to an eval() call. The ML classifier strongly indicates maliciousness. The embedded JavaScript file, 'javascript_obj0013_001.js', is highly obfuscated, suggesting it is designed to download and execute a secondary payload. The presence of JavaScript actions and embedded JS streams points towards an attempt to exploit vulnerabilities or deliver malware.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
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` `1896f3623e9bc959305cd07425261b2371e1c78548edc0f3a6d78f21be182729`	pdf-javascript-stream	PDF /JS object 13 at offset 0x36B	6300 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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