PDF malware analysis — malicious · 3a4be9c0365ba86d

MALICIOUS

PDF

4.4 KB Created: 2008-09-07 22:47:39 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 04bf27457cd0da8566e6e74ede6888bb SHA-1: c5cf9a0b2e7670e501574ee18eb98b09f41385be SHA-256: 3a4be9c0365ba86d805bd6e55ff520e2bc9b1ab8a6ee94f2e2145a7423045cfc

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file 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 is obfuscated and contains an eval() call, suggesting it is designed to execute arbitrary code. The primary attack pattern is likely to exploit vulnerabilities or deliver a secondary payload via this JavaScript. No specific family could be identified due to the obfuscation.

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` `9d85730527c71f41f1de3f5613ba648eb82599ba4cbf14bf2f8274595e28d59a`	pdf-javascript-stream	PDF /JS object 13 at offset 0x37A	5797 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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