PDF malware analysis — malicious · e850beb12dbe6779

MALICIOUS

PDF

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

MD5: a11fb61906520316b926b85e20de504b SHA-1: ffa41780ebab7942470376a07b7c8c1cf25426ae SHA-256: e850beb12dbe67794d55c452c4865713036e5b925aa523619a7a4c882202b003

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 malicious code. The JavaScript's exact function is obscured, but its presence alongside the ClamAV detection strongly suggests it's used to download and execute a second-stage payload. The document body is unreadable, providing no further context.

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` `167c31f5709e18c3e57f36e4339c8a0fa215b0822fc4d8e1bbc5aa7680c61ead`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	84563 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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