PDF malware analysis — malicious · dd91e091690a167c

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: 344438761d3303d7ec30a4ddef3f3bc8 SHA-1: 75962f6b20981664a179f829badd098308feebff SHA-256: dd91e091690a167ce09c81d6122b6ade709a4cba561cd808d2774fc30ee28f14

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 presence of PDF_JAVASCRIPT and PDF_JS heuristics further supports this. The JavaScript stream is likely responsible for the malicious behavior, potentially downloading and executing a secondary payload.

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` `b89179930c074819a5b1400c4ae252d6603f264ae095cfe7dd536b857bd6ffd3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75426 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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