PDF malware analysis — malicious · 7739fcd3e9ecd37a

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: 77f2706dd37c49874c9516981f8e4f2d SHA-1: e2be6ed7c93c5bf0eac038e85a761bf39dcdda45 SHA-256: 7739fcd3e9ecd37acc1d5d71f0e9e9e4cc8bb3543ce659e1245a2f33fcd5b3d4

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detections for 'Pdf.Dropper.Agent-7274159-0' and 'Win.Trojan.Agent-36166' on an extracted artifact strongly suggest this PDF is a dropper. The embedded JavaScript is likely responsible for downloading and executing the secondary payload. The document body was unreadable, limiting further analysis of the lure.

Heuristics 4

ClamAV: Pdf.Dropper.Agent-7274159-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7274159-0
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` `1ee639ddf1dc6e7fe5842625333a9fbbc18cd3efbebc179178738c8e33ceda30`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75445 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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