PDF malware analysis — malicious · 26972fc2e98e3109

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: 78b9d35e38bc53925489460ef213d982 SHA-1: 6b16fafdcffb78b79830275fa245f55cbecdc462 SHA-256: 26972fc2e98e3109f5cc461619354351f2c2b8104500024ad33860ec356fa18f

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The file is identified as a malicious PDF by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis detected embedded JavaScript, which is a common technique for delivering secondary payloads. The JavaScript stream is large, suggesting it may contain obfuscated code intended to download and execute further malicious content. The document body itself is unreadable, providing no contextual clues.

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` `165c0f4aff35b2cf59052cc4d203d4ff1fcce293c4f3de2260dadd236f44acec`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74315 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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