PDF malware analysis — malicious · 44d7b14ab61f8966

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: 611ecc728e15e0bd7606a634eeacc48d SHA-1: 016408ee6c74a9c323ce223685555b0fc088cbb6 SHA-256: 44d7b14ab61f8966aa6ecaf5f36fecde00948aef8be295cbb4c4af119049f2af

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, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. This JavaScript is likely responsible for executing the malicious payload. The exact behavior of the script could not be fully determined due to its size and potential obfuscation, but its presence strongly suggests a malicious intent.

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` `af531a7aeba6c5869b053129fc03010f64e8f89949b5288bdc21cdd06feb758c`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75166 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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