MALICIOUS
166
Risk Score
Malware Insights
MITRE ATT&CK
T1059.007 JavaScript
T1203 Exploitation for Client Execution
T1566.001 Spearphishing Attachment
The sample is a PDF file flagged as malicious by ClamAV and an ML classifier, indicating it contains an exploit. Heuristics confirm the presence of embedded JavaScript, which is used to construct and execute a string that likely downloads and runs a second-stage payload. The script's obfuscation and the nature of the exploit suggest a downloader or dropper functionality.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 4
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ClamAV: Pdf.Exploit.Agent-36174 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Exploit.Agent-36174
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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_obj0015_000.jsd2679f3f15d6e025ee8c17fa18b94c5a0f309ff0925fe97138da94e5b5bbdf34 |
pdf-javascript-stream | PDF /JS object 15 at offset 0x1281 | 1504 bytes |
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Detection
ClamAV:
Pdf.Exploit.Agent-36174
Obfuscation or payload:
unlikely
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