PDF malware analysis — malicious · bfba1275b7c779f0

MALICIOUS

PDF

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

MD5: 997329d1b69ccacef589102149938969 SHA-1: 50bd052b691345599fc4dca668fa05dd40acb6f8 SHA-256: bfba1275b7c779f06116a0892bb18fca0afd25094b77b7543d3a93e4d62e1f50

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_UNESCAPE heuristic suggests obfuscation, and the ML classifier strongly flags it as malicious. The embedded JavaScript file, 'javascript_obj0012_001.js', is the primary artifact, likely containing code to exploit a vulnerability or download a secondary 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

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
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_obj0012_001.js` `ecb947ab8decbb73768dbffc813485d401ffd37c84567a41b826953bbd7d2cfd`	pdf-javascript-stream	PDF /JS object 12 at offset 0x370	8143 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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