MALICIOUS
116
Risk Score
Malware Insights
MITRE ATT&CK
T1204.002 Malicious File: Malicious File
The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically detecting a PDF exploit. Embedded JavaScript streams were found, indicating the likely execution of malicious code upon opening the document. The primary technique observed is the use of JavaScript within the PDF to trigger an exploit, which is a common method for delivering further stages of an attack.
Machine Learning
- Nyx PDF Classifier malicious score 0.9999
Heuristics 4
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ClamAV: Pdf.Exploit.Agent-36063 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Exploit.Agent-36063
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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.
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syncAnnotScan annotation-staging primitive low PDF_FOXIT_SYNCANNOTSCANPDF JavaScript calls syncAnnotScan() — a no-op annotation-enumeration primitive used by exploit-kit JavaScript to stage payload reads from annotation /Subject fields before eval(). Not a vulnerable sink itself; rarely seen in legitimate PDFs. (matched in decompressed stream)
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
javascript_obj0007_000.jseb39e2de4dbbc100de6d3e30aa43ff78fa075618862ba1ebba5151ea3a3b848d |
pdf-javascript-stream | PDF /JS object 7 at offset 0x1D2 | 273 bytes |
deobfuscated.js69b5318d33d96cca20c41ddff8261d13f025bbc00cbd951de39c192d29010565 |
deobfuscated-js | PDF JavaScript deobfuscation pass | 2549 bytes |
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