PDF malware analysis — malicious · dbcf530711ca926b

MALICIOUS

PDF

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

MD5: acc83af7141426de7b1ff082798bf22c SHA-1: c1827afe5f65d9a8297c27d199e999ea980ad6be SHA-256: dbcf530711ca926b3ac69659a6c305f912d67ed7cbf5784f30a81dcb252c8ffb

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detections confirm this file is malicious, specifically identifying it as Win.Trojan.Agent-36166. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, although its exact functionality is obscured by its size and potential obfuscation. The presence of JavaScript actions within the PDF structure strongly suggests an attempt to exploit vulnerabilities or deliver malware.

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` `4e2cb64bedf6003a30ace9a67c37842da225bf7c94e8656e1e7f81914046714c`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	84713 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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