PDF malware analysis — malicious · 3f69d17966aef797

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: 9e8f2ce508304d5992f198bf5552255c SHA-1: 636faf7ec681c7d8cc27dce6fec3ec5eb41ba290 SHA-256: 3f69d17966aef797ea7a7c3e89db7f0b9ee6a394347ba3669ce7887c015daab3

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the 'PDF_JAVASCRIPT' and 'PDF_JS' heuristics. ClamAV detection confirms this file is malicious, specifically identifying it as 'Win.Trojan.Agent-36166'. The embedded JavaScript is the primary mechanism for exploitation, likely used to download and execute a second-stage payload. The document body is unreadable, so the rationale is based on the technical findings.

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` `031ad2bd49e733ed25db89a05417c2b32dc686cf7ee95e55554e8a2ee73483a8`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74578 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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