PDF malware analysis — malicious · a66f6fe7bc1cef69

MALICIOUS

PDF

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

MD5: cda1cd55ef7ace677157e7b50dd7bfc9 SHA-1: 1c4c5c019f50fb196725f4e7dae83d12dab77b34 SHA-256: a66f6fe7bc1cef69e6e962a8dd59d10e8711e3822d9f6fe23ca5466be3e98755

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file triggered critical heuristics indicating it is malicious, specifically ClamAV detections for 'Win.Trojan.Agent-36166'. The presence of embedded JavaScript streams (PDF_JAVASCRIPT, PDF_JS) suggests an attempt to execute code within the PDF viewer, a common technique for exploiting vulnerabilities or downloading further payloads. The document body was unreadable, but the combination of PDF format, JavaScript, and ClamAV detection strongly points to a malicious delivery mechanism.

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` `04b6f8913059647df5db1ad0960bc997d5ef8f69d694155effb3a676b2134370`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74382 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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