PDF malware analysis — malicious · 559d2d1a2ccaa921

MALICIOUS

PDF

5.5 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe (via Notepad)

MD5: 2193d95ca4175627c3c4a49ee4e51d9e SHA-1: 121a575275d6f68654b572ba9c6ca5d9b1929463 SHA-256: 559d2d1a2ccaa921bc43b9fc30c15b86926a81ebf32d4de5094dc9e38c71a127

90 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript with eval() calls, indicating an attempt to obfuscate malicious code. The ML classifier strongly flagged this PDF as malicious. The extracted JavaScript file, 'javascript_obj0006_000.js', is likely responsible for downloading and executing a secondary payload, which is a common technique for malware delivery. The obfuscation suggests an effort to evade detection.

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_obj0006_000.js` `3916165fe1dfb71392a54c139a1d7d90fa3d92763f821035e6bfb23881d9195c`	pdf-javascript-stream	PDF /JS object 6 at offset 0x135B	143 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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