MALICIOUS
186
Risk Score
Malware Insights
MITRE ATT&CK
T1059.007 JavaScript
T1203 Exploitation for Client Execution
T1566.001 Spearphishing Attachment
The PDF file contains embedded JavaScript that is heavily obfuscated. The script appears to be a downloader that decodes a string, likely a URL, to fetch and execute a secondary payload. The ClamAV detection of 'Pdf.Exploit.Agent-36175' further supports the malicious nature of this file.
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.js9ac8eb3f5e934960772bb6b10bc8ca4a152636e5df76ab9f336fec3d21569817 |
pdf-javascript-stream | PDF /JS object 8 at offset 0x1E7 | 132542 bytes |
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Detection
ClamAV:
Pdf.Exploit.Agent-36175
Obfuscation or payload:
unlikely
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