PDF malware analysis — malicious · 996cd044b3bcf5ea

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: 2f1a6bebf3e4aa240bb08325db1e476c SHA-1: 22fd9c0fb149e334d0f0ba763970a32c51947c7d SHA-256: 996cd044b3bcf5ea5b842da0c05300c2a580b6f97a4ce92667a69ae3f035e2dd

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 code. The JavaScript stream is large, suggesting it may be responsible for downloading and executing a second-stage payload. The document body is unreadable, so the rationale is based on the heuristic firings 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` `e447303b8c9359af5f144932ae36120b15ad7488d2d72367315cc2daa421f69b`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74286 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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