PDF malware analysis — malicious · 4cd182cda16ad3e0

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: 0654cdbbae917deb2a8c3d358a433b68 SHA-1: 40e34df9c49c4c7744a64f494d5d8c765ef2906a SHA-256: 4cd182cda16ad3e0d94ff51e63749f2f2134d3f4f29bbc27e629a0fbfe0deb89

90 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML classifier strongly flags this PDF as malicious. The JavaScript stream, named 'javascript_obj0013_001.js', is obfuscated and contains an eval() call, suggesting it's designed to download and execute a second-stage payload. The exact nature of the payload cannot be determined due to obfuscation, but the overall pattern points to a malicious document delivery mechanism.

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` `59496b8199034a68ded8b7a3be17f19503488ec3880dd8ca3219ded0c2a23a7a`	pdf-javascript-stream	PDF /JS object 13 at offset 0x364	6525 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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