PDF malware analysis — malicious · 35c90503a2e49fee

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: 8d9295b973e96f6089a43e1b0f0a96ed SHA-1: 9765e84b64706ff936a8c0c08b3c87e745284693 SHA-256: 35c90503a2e49fee343d4373f010834c9bcc8e9973dcb55820c05d2438c6e0ab

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file was detected as malicious by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript, indicating an attempt to execute malicious code. The JavaScript is likely responsible for downloading and executing a second-stage payload, which is a common technique for malware delivery. The document body was unreadable, so the rationale relies solely on the heuristic findings and the 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` `6ce0d985c12d08ce6514c3efedbe5dc7ac34068795a0451aa4407233b24f6e8e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75125 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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