PDF malware analysis — malicious · 9a6738c9f597e224

MALICIOUS

PDF

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

MD5: 873c3e2a4832134a385b082bc8a6be37 SHA-1: c69210a0b6463592e2cfceeb4d5f513734ebd7e0 SHA-256: 9a6738c9f597e224706fb5575bae1ce2d90ea5746826679ad9a2ed67af866859

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The file is a PDF document that contains embedded JavaScript. Heuristics indicate the presence of JavaScript actions and embedded JS streams. ClamAV detection confirms the file is malicious, identifying it as Win.Trojan.Agent-36166. The embedded JavaScript is likely responsible for downloading and executing a secondary payload, which is a common technique for malware delivery.

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` `2a6f1c597b0abca5ab418bff9cd678ed46fb1456d2d8f05480e958b4738f4a78`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74946 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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