PDF malware analysis — malicious · d44b2da876d34b56

MALICIOUS

PDF

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

MD5: 2b99fb01cdf516554605f9eeceef7f32 SHA-1: c6ece7de1bb018a39cbf2b227acb0b033610c6d3 SHA-256: d44b2da876d34b56fef14f16b44737277f0dd4e3bb0ca1cb1ee30f54c1737692

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. ClamAV also detected the file as 'Win.Trojan.Agent-36166', indicating a known malicious signature. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, which is a common technique for this type of malware. The presence of JavaScript actions and streams strongly suggests malicious intent.

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` `922ac08ee3a04cf5dfe7ec16c19b613cfe9db62e9672a19564f9e928107eff8f`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	76147 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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