MALICIOUS
186
Risk Score
Malware Insights
MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File
T1071.001 Web Protocols: HTTP
This PDF file was flagged as malicious by multiple engines, including a critical ClamAV detection for 'Pdf.Exploit.Agent-36175'. Static analysis revealed embedded JavaScript and the use of ASCIIHexDecode filters, indicating an attempt to obfuscate malicious code. The embedded JavaScript is the primary indicator of malicious activity, likely serving to download and execute a secondary payload.
Machine Learning
- Nyx PDF Classifier malicious score 0.9999
Heuristics 5
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ClamAV: Pdf.Exploit.Agent-36175 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Exploit.Agent-36175
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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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ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEXHex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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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_obj0008_000.jsca0bff6714d18b56420011990f8f764191d53bea142c697957ae99e0f6b8e0d4 |
pdf-javascript-stream | PDF /JS object 8 at offset 0x1E7 | 127502 bytes |
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Detection
ClamAV:
Pdf.Exploit.Agent-36175
Obfuscation or payload:
unlikely
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