PDF malware analysis — malicious · 55adf8f5acfe293d

MALICIOUS

PDF

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

MD5: 6488598abb2ab4b2c8e04a0cc8a2f3e5 SHA-1: dcdf6a0556f19431ca661ba6cdfcfb2045118d79 SHA-256: 55adf8f5acfe293db24b1645f6a31578fb65c617f9da1ec13290a07d97f9eacc

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 (Win.Trojan.Agent-36166) further confirm its malicious nature. The embedded JavaScript is likely responsible for downloading and executing a secondary payload, a common technique for malware delivery. The specific JavaScript content was too large to display here, but its presence strongly suggests malicious intent.

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` `fe01335b469be3823d8718d10c2f909c2aafeb77c2db7437f84285468868957f`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74570 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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