PDF malware analysis — malicious · fef559927a89470e

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: 4940e727d47ff4f4fd860a050772d55f SHA-1: 6d6a3ac596216a9544fb870d5a6138251bbdc19d SHA-256: fef559927a89470e3459e078480ffb4fe279fe609475a09f61d93777ea398914

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, which is a common technique for delivering malicious payloads. Heuristic analysis detected PDF JavaScript actions and embedded JS streams. ClamAV signatures confirm the presence of Win.Trojan.Agent, indicating the file is designed to download and execute a second-stage payload. The extracted JavaScript object, though large, is likely responsible for the malicious behavior.

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` `c9c7bd735efc33820b4f8ff1d69c1f77f263b0e45eceb4378de68b1acb876dd8`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74309 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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