MALICIOUS
168
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
T1204.002 Malicious File
The PDF file was flagged as malicious by multiple engines, including ClamAV which identified it as Win.Trojan.Agent-36166. The presence of embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics, suggests the file is designed to execute malicious code. The ML classifier also provided a very high confidence score for maliciousness. The document body content was unreadable, but the combination of heuristics and ClamAV detection strongly indicates a malicious intent, likely 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.jsb2e8f8302444b23c3bb81abf6a3c4f44cda5fbcdee7bb0681c2964d5a9810fd4 |
pdf-javascript-stream | PDF /JS object 7 at offset 0x1A5 | 74537 bytes |
|
Detection
ClamAV:
Win.Trojan.Agent-36166
Obfuscation or payload:
unlikely
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