Win.Trojan.Agent-36166 PDF malware analysis — malicious · a85b6b38fa4556a0

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: 48105e238b773e8b2c61df4b33908119 SHA-1: 36c050ec3fc0e8042781da224ae02f098527695b SHA-256: a85b6b38fa4556a0e754b88923795d431db76659020ba32f86ff226d4536e24b

136 Risk Score

Malware Insights

Win.Trojan.Agent-36166 · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell

The critical ClamAV heuristic firings indicate the file is recognized as Win.Trojan.Agent-36166. Additionally, PDF-specific heuristics detected embedded JavaScript actions and streams, suggesting the PDF is designed to exploit vulnerabilities and execute malicious code. The extracted JavaScript is likely responsible for downloading and executing a second-stage payload.

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` `525384d8596aa6d7861f1f1ea439b0173239baf6b69160ec273441597dc40ca4`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74789 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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