PDF malware analysis — malicious · aba9e1eadb8d9c09

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: 9cd83b6abe773c443993817cd1ebb991 SHA-1: 78a3021496f681db06939ede4026f9ba8bfc8416 SHA-256: aba9e1eadb8d9c09d1f977279eef3a934eddc076f490dfdb7a4d4035a31ddf8c

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. It contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. This script is likely responsible for downloading and executing a secondary payload, a common technique for malware delivery. The document body was unreadable, so the rationale is based on the heuristics and the ClamAV detection.

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` `566538a16e182f9d50b9118946e8f7ad3eba740afd018df6d761c82a2ddb11ee`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74938 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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