MALICIOUS
106
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 JavaScript/Shell Scripting: JavaScript Execution
T1204.002 Malicious File: User Execution: Malicious File
The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detected this as Js.Exploit.Shellcode-18, suggesting it exploits a vulnerability to run shellcode. The PDF_FILTER_HEX heuristic also points to potential exploit activity. The embedded JavaScript is the primary mechanism for the attack, likely downloading and executing a second-stage payload.
Heuristics 7
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ClamAV: Js.Exploit.Shellcode-18 critical CLAMAV_DETECTIONClamAV detected this file as malware: Js.Exploit.Shellcode-18
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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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XFA form low PDF_XFAPDF uses XML Forms Architecture — can contain script logic
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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 exited 1. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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Embedded URL info EMBEDDED_URLOne or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.URL http://ns.adobe.com/xdp/
- http://www.xfa.org/schema/xci/2.6/
- http://www.xfa.org/schema/xfa-template/2.6/
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