MALICIOUS
142
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 JavaScript/JScript
T1204.002 Malicious File
The critical ClamAV detection and high ML classifier score indicate this PDF is malicious. The presence of PDF-specific heuristics like PDF_JAVASCRIPT, PDF_JS, PDF_FILTER_HEX, and PDF_FILTER_85, combined with the ML_NYX_PDF_MALICIOUS firing, strongly suggests an exploit targeting PDF viewers. The embedded JavaScript, likely obfuscated by ASCIIHexDecode and ASCII85Decode filters, is designed to execute arbitrary code, probably to download and run a second-stage payload.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 6
-
ClamAV: Pdf.Exploit.Agent-36178 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Exploit.Agent-36178
-
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.
-
String.fromCharCode low PDF_FROMCHARCODEString.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
-
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.