PDF malware analysis — malicious · 3dcb60ff060fe57c

MALICIOUS

PDF

25.9 KB Created: 2011-72-51 03:25:00

MD5: c2a97f7317355c2b4c63852a93a5f5e6 SHA-1: 21d61a3d8655310d4b6b498cc51f11e5b8d7ba3d SHA-256: 3dcb60ff060fe57cc4196a2ff206797b8f86f5801a0b260f10885e3197b70a7f

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF contains embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. The presence of a high-severity PDF_EVAL heuristic indicates the use of eval(), a common technique for obfuscating malicious JavaScript. The ML classifier strongly supports the malicious nature of the PDF. The extracted JavaScript file, javascript_obj0001_000.js, is the primary artifact, and its obfuscated nature suggests it is designed to download and execute a secondary payload.

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_obj0001_000.js` `842b51eaad0f8ab6c2c4d74bbac205e6cbc438d6e28c70f183d3cb7ac537df31`	pdf-javascript-stream	PDF /JS object 1 at offset 0x632E	905 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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