PDF malware analysis — malicious · f4e91d1e251f525c

MALICIOUS

PDF

9.7 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: d91c9bfd60a1f10fe97ddb5692bf729f SHA-1: f32f515271c8ec50dd48538bec650943e954a9d6 SHA-256: f4e91d1e251f525cbad9feccc264057e6af79b3e4b19ad1c8975b2ccc2e42e43

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, which is flagged by multiple heuristics including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ML classifier also strongly indicates maliciousness. The JavaScript stream, named 'javascript_obj0013_000.js', is obfuscated and contains an eval() call, suggesting it's designed to download and execute a second-stage payload. The presence of Scribus metadata is noted but does not directly inform the malicious behavior.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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_000.js` `964a6c60e7b7d90d04fa0fc1ad10fd7467f309a61467d2359eefe0d602569197`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	8402 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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