PDF malware analysis — malicious · 31f37f8c05e2d647

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: f40fc37948625aaa407306a5b8580c0b SHA-1: 52e81588dfbea63774a885b830cc7716b63eb320 SHA-256: 31f37f8c05e2d64741df61753b672525c7b507a7a351991ffe12ba7be2d96c0b

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. The presence of a PDF_EVAL heuristic firing indicates that the JavaScript likely uses eval() to execute obfuscated code. The ML classifier strongly supports a malicious verdict. The embedded JavaScript file, 'javascript_obj0013_001.js', is the primary indicator of malicious activity, likely serving as a downloader or dropper for further malicious payloads.

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` `d5ba46eff73d7a90d13b678738c551d3bf7ee2a57de332f57dbb86f690a6b835`	pdf-javascript-stream	PDF /JS object 13 at offset 0x367	6362 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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