PDF malware analysis — malicious · c00396ed365dda91

MALICIOUS

PDF

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

MD5: 3a028365417579076656eaabe115a2dc SHA-1: bddcc71932e028be1c2340025bc34d5085b54818 SHA-256: c00396ed365dda911fe5ca3b8d1fb03da7e076b67bc547815312a6391bd27536

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript

The PDF file was detected as malicious by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript, indicating an attempt to execute arbitrary code. The presence of JavaScript actions and embedded JS streams strongly suggests the document is designed to download and execute a second-stage payload, a common technique for malware delivery. The document body was unreadable, so the rationale is based solely on the heuristic firings and the ClamAV detection.

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` `b4032eef8046f3ba2c8aa5cc6c2c5d782b71b6deaaead80cb1b57d243a64c72e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74374 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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