PDF malware analysis — malicious · fb6acf03c3eb75de

MALICIOUS

PDF

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

MD5: e4e5024bbb3fef8bc42656bcdf296509 SHA-1: bcffc9a1eb89ae674b14df099d9c686e95b72f8d SHA-256: fb6acf03c3eb75de2a37695507833b86a8831ae72f6755d4ca32c1a06b91eb51

90 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, flagged by multiple heuristics including a high-severity eval() call. The ML classifier strongly indicates maliciousness. The embedded JavaScript file, 'javascript_obj0006_000.js', is likely responsible for executing the malicious payload. The obfuscated nature of the script and the use of eval() suggest an attempt to hide the true nature of the executed code, which is typical of malware 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_obj0006_000.js` `0f6545521989d970880e2bb118fe27878d46bce2da1c037ff04262c3767ace9d`	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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