PDF malware analysis — malicious · e9f930e5bcbf55e7

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: a9bdb97ae570236f479cad293b3ffb01 SHA-1: 4cd6e474bef72bb9e1b15a98b2a67dd7a74b164c SHA-256: e9f930e5bcbf55e765b5be307600416b004a0c3b17e40d3522e6c92ca2d6b3c1

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, identifying it as a dropper agent. The embedded JavaScript stream is likely responsible for downloading and executing the secondary payload. The ClamAV detections provide strong indicators of its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Pdf.Dropper.Agent-7319267-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7319267-0
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` `fa7992f6ea738f38b638e8ed35b67cb902bc74e57fec8b269f6ca84cdc19102e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74934 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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