PDF malware analysis — malicious · 4827dba80d08068f

MALICIOUS

PDF

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

MD5: 97bf4323100c09fe5e525444987fd4af SHA-1: 3a2ca131662063f17cf26303a2536b34ba74c0cf SHA-256: 4827dba80d08068fd8a507b6a107ffe039265f68b44661bb2d067a04934ecff0

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, which is further obfuscated using an eval() call. The ML classifier strongly indicates maliciousness. The extracted JavaScript file, 'javascript_obj0001_000.js', is the primary artifact. The script's purpose is to execute obfuscated code, likely to download and run a second-stage payload.

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` `d2762aa37e80be071130a618500fe2463d8ba336d4158e68a8f38a1d42314b7f`	pdf-javascript-stream	PDF /JS object 1 at offset 0x619E	537 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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