PDF malware analysis — malicious · d148bcffb7b94c5e

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: 6bf9101cab7cb8829c704c268e10d30c SHA-1: 2502ce7a99ced168221a91a769e28a8e3fcda66d SHA-256: d148bcffb7b94c5ec9e5ec306c4518cd5c100611046c6cef2ffc45eac3934a7e

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The file is a PDF document identified by ClamAV as Win.Trojan.Agent-36166. Static analysis detected embedded JavaScript, which is often used to deliver malicious payloads or exploit vulnerabilities. The presence of JavaScript actions and embedded JS streams strongly suggests an attempt to execute arbitrary code upon opening the PDF. The specific JavaScript content was too obfuscated to determine its exact function, but the overall pattern indicates a malicious downloader or exploit delivery mechanism.

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` `5be2f88e5d977fe7e013e6a4a017c93001fe5d2c393c4862cf4d1c91f56186ca`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75119 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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