PDF malware analysis — malicious · e66e292ca4411419

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: de838bab8f2ee27d571e9100c7088f42 SHA-1: fc70de2b7c05d01a981fc89f995448a89c13a252 SHA-256: e66e292ca441141962420e2d48af40807e9a6e5c9c02dd8b022135244e04922c

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection identifying it as 'Pdf.Dropper.Agent-7317411-0'. Additionally, an embedded JavaScript stream was detected, which is commonly used by droppers to download and execute further malicious content. The ML classifier also provided a very high confidence score for maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Pdf.Dropper.Agent-7317411-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7317411-0
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` `4b92c0ce98e89380267cb3bedde9c81fbfca6b5f0888e3eac9c1237b64c2921e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74600 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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