PDF malware analysis — malicious · e956ee15ad71262e

MALICIOUS

PDF

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

MD5: 34a8b205b67b5d1d33d0e46ea31f9f23 SHA-1: 00858715e93f192d6758a4214703b6fb9d7ca52b SHA-256: e956ee15ad71262e22858c765bdef2e9ac3725a2326fe1b24d86b2d730fd01aa

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

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 likely functions as a downloader for a secondary stage payload, which is a common technique for this type of threat. The document body was unreadable, so the rationale is based on the heuristic firings and the ClamAV detection.

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` `800fda12bc2c0d2a7b3d0eeb82746ad9c5a7da2f83a95e6e59888dd870dcb95e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75958 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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