PDF malware analysis — malicious · 42299c4cdaaf813d

MALICIOUS

PDF

15.0 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)

MD5: 1739901455bf0ce58c5d5cd3a44784a2 SHA-1: 6605c17eee6425d06be96bfb46ba4d0c9244251e SHA-256: 42299c4cdaaf813ddc51df12476067fb3e6a199036d86d2eb750e53f5457bd49

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF identified as malicious by ClamAV and an ML classifier. Heuristics indicate the presence of embedded JavaScript, which is often used to exploit PDF vulnerabilities and download further malicious content. The embedded JavaScript stream is the primary indicator of malicious activity, suggesting a downloader or dropper functionality.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Win.Trojan.Agent-36166 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-36166
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `3966961fa0737eecc21b5cf60c68d6870beeac9e3037afb844936b1019a5bb93`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	83812 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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