MALICIOUS
134
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment
T1027 Obfuscated Files or Information
The PDF contains embedded JavaScript and utilizes ASCIIHexDecode and ASCII85Decode filters, which are common indicators of exploit attempts. A machine learning classifier strongly flagged this PDF as malicious, correlating with the presence of JavaScript. The combination of these factors suggests the PDF is intended to deliver a malicious payload, likely by exploiting a vulnerability within the PDF reader.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 5
-
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.
-
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEXHex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
-
JavaScript action low PDF_JAVASCRIPTPDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
-
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.
-
ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation
Open this report in the interactive analyzer, or submit your own file for analysis.