PDF malware analysis — malicious · 1f22f9ef68f99469

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: e23d1664869d9d46540854341f409313 SHA-1: aee2ef0b056059bee31272713573d651863aa88d SHA-256: 1f22f9ef68f994693df3544478104e9dd11dcd14c62fd21fd1de19277d84d7b9

90 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF sample 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, suggesting it is designed to download and execute a second-stage payload. The primary attack vector appears to be leveraging a PDF vulnerability to run this script.

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` `a9e8c691aef8ad5e040e3f0dbd8f112ed010760bc6ecfe177910906eef4cf1d5`	pdf-javascript-stream	PDF /JS object 13 at offset 0x36A	6226 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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