PDF malware analysis — malicious · ca9a63ee8c1ed711

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: 5d05b9ae182bf83a01df2d74d917b314 SHA-1: 5f01f8dab5b73b7d2f4c49ae5ea4ce360929a182 SHA-256: ca9a63ee8c1ed711fe4b7a0a49858aa7281bf145b660e2ff92a1a9edb48ebf8d

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, evidenced by the 'PDF_JAVASCRIPT' and 'PDF_JS' heuristic firings. The critical ClamAV detection of 'Win.Trojan.Agent-36166' on both the main file and an extracted artifact strongly suggests malicious intent. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, which is a common technique for this type of malware.

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` `742427c753e9f9aeebd6072c1a21069f3b7ed69051d64eff9ed5e60169573769`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74744 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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