PDF malware analysis — malicious · ef4412b44e6e13cc

MALICIOUS

PDF

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

MD5: f04b63d856f1cefdb69713ae1ebae72d SHA-1: 46b439414b433e6ea9effa6c06e4cd66e2cbf066 SHA-256: ef4412b44e6e13ccd2a45e6d0f8ae6087e79fbd2b0b9637dc98c86442c39b1b8

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

This PDF file was flagged as malicious by a machine learning classifier with high confidence. Static analysis revealed embedded JavaScript containing an eval() call, which is a common technique for obfuscating malicious code execution. The JavaScript stream is likely responsible for exploiting a vulnerability or downloading a secondary payload. No specific family could be identified due to the obfuscation.

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` `c3b7798dfde1a3903572e81cb6e077c368c91868f605b6a59080dbf1433e21d4`	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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