MALICIOUS
186
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
T1204.002 Malicious File
T1566.002 Spearphishing Attachment
This PDF file was flagged as malicious by multiple engines, including ClamAV which identified it as Pdf.Exploit.Agent-36175. Static analysis revealed embedded JavaScript and the use of ASCIIHexDecode filters, indicating an attempt to exploit a PDF vulnerability. The primary function appears to be the execution of this embedded JavaScript, likely to download and execute a second-stage 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.js8cfb7cce014fe2c7ce47d682874887f883afdd1d264b0c2852e79b3fda99263b |
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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