MALICIOUS
114
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 JavaScript/JScript
T1566.003 Phishing:Malicious File
The PDF sample contains embedded JavaScript, flagged by multiple heuristics including a critical correlation signal. The ML classifier also strongly indicated maliciousness. The presence of JavaScript actions and streams within the PDF structure suggests an attempt to execute code, likely to download and run a secondary payload or exploit a vulnerability. No specific family could be identified from the available evidence.
Machine Learning
- Nyx PDF Classifier malicious score 0.9937
Heuristics 4
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Correlated malicious PDF JavaScript signals critical PDF_CORRELATED_MALICIOUS_JSPDF JavaScript or auto-action content is corroborated by exploit staging, ML, or suspicious extracted-artifact findings. This correlation promotes old exploit-kit PDFs that otherwise remain in the suspicious band because each individual signal is intentionally weighted conservatively.
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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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Optional Content Group with action trigger low PDF_OPTIONAL_CONTENTOptional Content Group (layer) co-occurs with an action trigger — content can be selectively hidden from viewers or scanners while the action still fires on open
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