MALICIOUS
166
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
T1204.002 Malicious File
The PDF contains embedded JavaScript, flagged by multiple heuristics, and is detected by ClamAV as a dropper. The ML classifier also strongly indicates maliciousness. The embedded JavaScript is likely responsible for downloading and executing a secondary payload, as indicated by the ClamAV detection of 'Win.Trojan.Agent-36166' on an extracted artifact. The specific nature of the payload could not be determined due to the obfuscated nature of the JavaScript.
Machine Learning
- Nyx PDF Classifier malicious score 0.9999
Heuristics 4
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ClamAV: Pdf.Dropper.Agent-7253812-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Dropper.Agent-7253812-0
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ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAVClamAV 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.
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JavaScript action low PDF_JAVASCRIPTPDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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Embedded JS stream low PDF_JSPDF 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.js5ba427d13d19f98c28a2937536f5fbe82a7e5f6fcda9ce96ad6acb58d68285b8 |
pdf-javascript-stream | PDF /JS object 7 at offset 0x1A5 | 75025 bytes |
|
Detection
ClamAV:
Win.Trojan.Agent-36166
Obfuscation or payload:
unlikely
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