PDF malware analysis — malicious · e2c81db586af6bb1

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: 9e51a4fb2d3db1ce104912b80c86e96c SHA-1: 43f196aa80914f2812b0004fbc16ad16b7cd24fe SHA-256: e2c81db586af6bb15f55f7f255f78fb5eb9fa44e60782a0af73dc556672943f7

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The file is a PDF containing embedded JavaScript, as indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detection confirms this is malicious, identifying it as Win.Trojan.Agent-36166. The embedded JavaScript is likely responsible for downloading and executing a secondary payload, which is a common technique for this type of malware. The document body was unreadable, so the rationale is based on the heuristics and 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` `6c2f06030df53e26d0af81ee4438ea9602ce61c91f408934a3d573e37a01f27e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74370 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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