PDF malware analysis — malicious · 4380979f912b1b58

MALICIOUS

PDF

2.7 KB Created: 2008-12-17 23:30:58 UTC

MD5: 394eb05f397a6fa0844f711170f0ed82 SHA-1: 9bc5ba8fc28ef17d988a5622b9c39a7f92dcf5b3 SHA-256: 4380979f912b1b58758383fade3e1745a5b7094a042624d80add6f74e7959514

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file exhibits malicious characteristics, primarily due to the presence of embedded JavaScript. The heuristics indicate a JavaScript action, an embedded JS stream, and a high-severity eval() call, suggesting the script is designed to execute arbitrary code. The ML classifier strongly supports this assessment. While the specific functionality of the JavaScript is obfuscated, the use of eval() implies it's likely downloading and executing a second-stage payload. No document body text was available for analysis.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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_obj0006_000.js` `a75927f308325e3a4a1107980011d1de2bf30bcfbd0c3db2e2a01030d261a632`	pdf-javascript-stream	PDF /JS object 6 at offset 0xB5	3793 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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