PDF malware analysis — malicious · aadb58fc69335882

MALICIOUS

PDF

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

MD5: 961bd4123225c07ee231dca5c3d2ed3e SHA-1: 0524e3aa8124dc01ee978a67f2ac7d11efe9893e SHA-256: aadb58fc69335882a00f1fd1411be4065bfecef5a7c5daf64f60a24d706086eb

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, indicating an attempt to execute code. The primary attack pattern involves leveraging JavaScript within the PDF to initiate a malicious download and execution chain. The specific JavaScript stream was too large to analyze in detail, but its presence strongly suggests a downloader or dropper functionality.

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` `cd6fa1874b93111f9da4303aa3689528963e162456df44058a5262f96e2db671`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74387 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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