MALICIOUS
166
Risk Score
Malware Insights
MITRE ATT&CK
T1059.007 JavaScript
T1203 Exploitation for Client Execution
T1566.001 Spearphishing Attachment
The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating embedded JavaScript. The JavaScript code appears to be obfuscated but is designed to execute a series of operations, likely to download and execute a second-stage payload. The presence of JavaScript within a PDF strongly suggests an attempt to exploit a client-side vulnerability.
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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