PDF malware analysis — malicious · 8bb68f745c2d0d75

MALICIOUS

PDF

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

MD5: 3c79adea63b71c001fa62e3f58857878 SHA-1: d7382fdcb0ea47d5c1c2232a384742721e675962 SHA-256: 8bb68f745c2d0d759f5ae7a841c3933f7699db275688c9af139d14fe94a1d6e9

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 potential for malicious code execution. The JavaScript's likely purpose is to download and execute a second-stage payload, which is a common technique for malware delivery. The document body was unreadable, so the rationale is based on the heuristics and ClamAV detection.

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` `c632938eabfc69daec59c532dadb95f3f4dda4a8da1843ddfcca5004f7351a5a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75219 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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