PDF malware analysis — malicious · 3cded436cf193d1a

MALICIOUS

PDF

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

MD5: 9ae728a63755d37b3c222eeb6188e6b0 SHA-1: c14768a79ade04dd927c6456245daadc3c0dcdb9 SHA-256: 3cded436cf193d1a449eeb7b258d8057a5a3fa44ed54809ffd912ca844c1bff6

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged by multiple heuristics, including ML classifiers and ClamAV, indicating malicious intent. The presence of embedded JavaScript, identified by PDF_JAVASCRIPT and PDF_JS firings, strongly suggests that the script is responsible for executing the malicious payload. ClamAV detections on both the PDF itself (Pdf.Dropper.Agent-7252141-0) and an extracted artifact (Win.Trojan.Agent-36166) confirm its nature as a dropper. The ML classifier's high confidence score further supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Pdf.Dropper.Agent-7252141-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7252141-0
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` `ae3bb578de098c5c23c9b895392c9f44f0b03c2efce5e4a96949851bbc505cdc`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	84181 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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