PDF malware analysis — malicious · 3caa662213a24547

MALICIOUS

PDF

3.3 KB Created: 2009-16-20 53:03:14

MD5: 21f05c819712e39a7a4d089b4f31e602 SHA-1: 36d3cdd2e610c62a52bf4e170859ba0871e5d5ae SHA-256: 3caa662213a24547d414f2558e4244c649598e71d1917421124e8e674786c726

190 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

This PDF sample was flagged as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. The presence of PDF_JAVASCRIPT, PDF_JS, PDF_EVAL, and PDF_UNESCAPE heuristics points to the use of embedded and obfuscated JavaScript. The ML classifier output of 0.999982 further supports this. The primary attack pattern involves leveraging JavaScript, likely to download and execute a second-stage payload, as suggested by the 'Dropper' classification.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Dropper.Agent-7251989-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7251989-0
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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` `a97655385e1a9ad8b0351d56f73650e9f839a51ae87fac37fe7eb49204fc69ab`	pdf-javascript-stream	PDF /JS object 6 at offset 0xC5	21018 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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