PDF malware analysis — malicious · 442ab6d1bd869ff7

MALICIOUS

PDF

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

MD5: f508584319002749f76407143e4637b6 SHA-1: d334a7c1025920eadedb555519b896ae24dcc92a SHA-256: 442ab6d1bd869ff769f74b9402696994f0a1cc8f562a1b1666b2b580d0e364d0

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, preventing a detailed analysis of its specific actions. However, the presence of eval() and obfuscation strongly suggests it's designed to download and execute a second-stage payload.

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` `c7bba4b0bd88397ab94ac4740885a4d7fd44fa76617cb5a40559ab03eeb1c061`	pdf-javascript-stream	PDF /JS object 13 at offset 0x364	6223 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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