PDF malware analysis — malicious · c6f8e9dbd64f2cd1

MALICIOUS

PDF

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

MD5: 1976d2635cb22d9c5e08d70fcbfaa6ca SHA-1: 4c4f55156ea56cf543ab63f65fdeb29e261aa1f9 SHA-256: c6f8e9dbd64f2cd170b929fe2dbd65a83a9d180a16c4c2635d42838f7cea83a9

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

This PDF file contains embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ML classifier strongly indicates maliciousness. The JavaScript stream, identified as javascript_obj0013_001.js, is obfuscated but the presence of eval() suggests it's designed to execute arbitrary code. This is consistent with a downloader pattern, where the script likely fetches and runs a secondary malicious 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` `2ad99a9e30875bc9402d17ffaa6195c01b45b383a34fdd83d19fd0380f18ef44`	pdf-javascript-stream	PDF /JS object 13 at offset 0x36B	6391 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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