PDF malware analysis — malicious · 300957bccd3e0375

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: 64d909aa7ee44a0604cf8a9d0b8c7477 SHA-1: c6746c2bf30bea304d5560c0e20cc97120bb7b20 SHA-256: 300957bccd3e037537a75f59f3199cc4f50c021693c92466eb7a03c6cf2ecdfe

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell Script Execution

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detections (Win.Trojan.Agent-36166) further confirm its malicious nature. The embedded JavaScript is the primary mechanism for delivering the malicious payload, likely involving downloading and executing additional malware. The document body is unreadable, so the rationale is based on the script and heuristic findings.

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` `7fe6bf0e37cfec792146146b2cc1fcc92f898d22d627b8ed307313caa1d8280a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74746 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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