MALICIOUS
166
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
T1204.002 Malicious File
The PDF file was flagged as malicious by a critical ClamAV detection, specifically identifying it as 'Win.Trojan.Agent-36166'. Static analysis revealed embedded JavaScript, which is a common technique for delivering malicious payloads. The ML classifier also strongly indicated maliciousness. The presence of embedded JavaScript and the critical ClamAV detection strongly suggest the file's intent is to download and execute a second-stage payload.
Machine Learning
- Nyx PDF Classifier malicious score 0.9999
Heuristics 4
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ClamAV: Win.Trojan.Agent-36166 critical CLAMAV_DETECTIONClamAV detected this file as malware: Win.Trojan.Agent-36166
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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.js081c49cb873baa32fd2d124f88404e14357f1058aac0e7603b615661705c919e |
pdf-javascript-stream | PDF /JS object 7 at offset 0x1A5 | 75173 bytes |
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Detection
ClamAV:
Win.Trojan.Agent-36166
Obfuscation or payload:
unlikely
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