PDF malware analysis — malicious · efffaa66f29e0edc

MALICIOUS

PDF

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

MD5: 85f5c643aa56e26683b253b4768b4ca3 SHA-1: ff4e1aa168b1a14b914a7e0f0ab0c68d76d38734 SHA-256: efffaa66f29e0edc105fcce59bc8a4b56c385225a65c7f750bc4d3c7fa62caa9

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detection confirms this as a malicious Win.Trojan.Agent. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, as is common with this type of attack. The document body is unreadable, but the presence of JavaScript and the ClamAV signature strongly suggest a malicious intent.

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` `51e3bf2c4f9aded883081e5840af4ab6c86ee717139c1a0327149a0027f21672`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74326 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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