PDF malware analysis — malicious · 55ddd3c4f04ad419

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: 9d9da706c3eae8a14fb8c4ca087bf8a4 SHA-1: aee673e130afb1838bc70439ed8bbb15a3e3d33d SHA-256: 55ddd3c4f04ad419aac9ca11bd91d1e45a5157dda0366989228f74d055ac4a84

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by 'PDF_JAVASCRIPT' and 'PDF_JS' heuristic firings. ClamAV also detected the file as 'Win.Trojan.Agent-36166', confirming its malicious nature. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload. The presence of JavaScript actions and streams within the PDF structure strongly suggests an attack pattern involving the exploitation of PDF vulnerabilities or social engineering to trigger malicious script execution.

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` `9465573053beaf340321d16411a17207b97d2afad52cd47b21e2bf4eb9b76dc7`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75153 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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