MALICIOUS
108
Risk Score
Malware Insights
MITRE ATT&CK
T1059.007 JavaScript
T1203 Exploitation for Client Execution
The PDF file contains embedded JavaScript and utilizes an OpenAction, indicating an attempt to automatically execute code upon opening. The ML classifier strongly suggests malicious intent. While no specific URLs or hashes were extracted, the presence of JavaScript and the OpenAction points to a client-side execution attack, likely to download and run a second-stage payload.
Machine Learning
- Nyx PDF Classifier malicious score 0.9997
Heuristics 5
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OpenAction trigger high PDF_OPENACTIONPDF has an /OpenAction that launches, submits, or opens an external target
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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.
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PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILEDThe cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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