PDF malware analysis — malicious · 94f2102909dc3b29

MALICIOUS

PDF

1.95 MB Created: 2011-72-51 03:25:00

MD5: dd23728ab94a724e3faf65537af74e04 SHA-1: 6fafcc3b970a24795cd5ccb4c458f5a9698632b7 SHA-256: 94f2102909dc3b29a4e34498a9cf026da0af3931e685e4208d29c729f2b296b9

90 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 an eval() call within the JavaScript stream (PDF_EVAL) strongly suggests code execution. The ML classifier also confirms maliciousness with a high score. The embedded JavaScript file, javascript_obj0001_000.js, is likely responsible for the malicious payload delivery.

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_obj0001_000.js` `1a6dec6799bd2db7f80171a64d1a9551b4b03d84a3adddb0801555c8876902c7`	pdf-javascript-stream	PDF /JS object 1 at offset 0x6219	545 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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