PDF malware analysis — malicious · b881c67a69fb5e48

MALICIOUS

PDF

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

MD5: b0143656c8e49a58aa7b5439dbedbcd7 SHA-1: ee13177683846b86183c0ece11fe86a2de5d5f65 SHA-256: b881c67a69fb5e48a4eb3da8bca99025a210588cabc4d472264ca6a35ea99850

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file was flagged by ClamAV as Win.Trojan.Agent-36166, indicating a known malicious signature. Static analysis also identified embedded JavaScript, which is a common technique for delivering second-stage malware. The JavaScript stream is likely responsible for downloading and executing the payload, contributing to the overall malicious nature of the document.

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` `8d07941219e716a3500ebf4bfbb725898caf36f9fca1dca0aebcc8c3c9153d39`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75160 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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