PDF malware analysis — malicious · ac94c09a96eb3c3f

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: 60bdeaf48c2def4a3d88beff6c7b30f5 SHA-1: fa79fbaff2ef2f12544f3d8ccaebde337ada4cf8 SHA-256: ac94c09a96eb3c3fa7c3ad92ca840086ea761aea46cc0bb86ced6d16706f5637

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, which is often used to download and execute further stages of malware. 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` `cd9479315609d3dd643b2c47b525ffacab5b21a8323952bc24e8f8b2992c6456`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75109 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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