PDF malware analysis — malicious · 37e48aee02977e1a

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: e692c3eb72ae2ad790163403989afa6e SHA-1: d354494260ab5a3100e8a8918593722acd8517f0 SHA-256: 37e48aee02977e1a07321560ee0fcd6a25ed21054c48b908b0a3f8b066f6ae22

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript

The file is a PDF containing embedded JavaScript, as indicated by multiple heuristic firings and the ML classifier. ClamAV detection confirms it is malicious, specifically identifying it as Win.Trojan.Agent-36166. The embedded JavaScript is the primary mechanism for exploitation, likely leading to the download and execution of a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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` `e026edd9fe66e37aae3a49e9273e74893dadec356ac358d0fdeaff69125ff2ec`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74828 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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