PDF malware analysis — malicious · f284a86eaaa549a1

MALICIOUS

PDF

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

MD5: 748c9c79f4001691180417bb7ef3af8b SHA-1: b3f22210731a5b6af7b95e0129ec757b6bd9e97f SHA-256: f284a86eaaa549a1207332da554281d48bb253588e814978ca0ce5db9638f2b9

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is identified as malicious by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis detected embedded JavaScript, suggesting the PDF is designed to execute malicious code. The JavaScript's exact function is unclear due to potential obfuscation, but it is highly probable that it attempts to download and execute a second-stage payload.

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` `9671a65dd511821bcfbcce6fb4029e42ae26bb2b28d6c14d53d5bbffb5a0d980`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	83940 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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