PDF malware analysis — malicious · 51e5d5d21c6ab7de

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: 8168c4da5fb034ab55b49fa98450c438 SHA-1: 745f3187769f4506f6151dde7b8729ef512aeb46 SHA-256: 51e5d5d21c6ab7de59649a4525f10ecae1ead577c5b20179c4139498a3de8058

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 a likely attempt to download and execute a second-stage payload. The heuristics suggest JavaScript actions and embedded JS streams, further supporting this conclusion. The exact behavior of the script is not fully discernible due to potential obfuscation, leading to a moderate confidence level.

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` `d369b79335495c41457e5e1c18d56540509ba0ddc12e3ab3b061cb561dfe2a53`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74873 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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