PDF malware analysis — malicious · 4b7bbc1b8b9f50cf

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: 84ac9f8229d834a2e73e96b092b2672c SHA-1: 2229e8930cd4a80f25adef86ad324d0e7d095904 SHA-256: 4b7bbc1b8b9f50cf61e3a6efa26005d0a7e4b112e6e50e41c4f4b4731bd6057f

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file exhibits malicious behavior through embedded JavaScript, triggering critical heuristics for ClamAV detection as Win.Trojan.Agent-36166. The presence of JavaScript actions and embedded JS streams strongly suggests the file's intent is to download and execute a malicious payload. The ClamAV detection provides a specific identifier for the detected malware family.

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` `8999ed9df987d4bab5da3ef63d8c6714987c175376092633e030e3ab83da5520`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74790 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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