PDF malware analysis — malicious · 1746bc111e98b8ab

MALICIOUS

PDF

590 B

MD5: 3a755ee7b7e9f1636602c0364243d174 SHA-1: e80d3158b80ce6b55a18689c4ebe18142ebfe0f3 SHA-256: 1746bc111e98b8ab93916789665b3f976f5a4aa9dba0058806fca0dcb17e6b5f

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF sample contains embedded JavaScript, including calls to eval(), which is a common technique for executing malicious code. The heuristics indicate a PDF JavaScript exploit cluster, suggesting the file is designed to exploit a vulnerability to run arbitrary code. The ML classifier strongly flags this PDF as malicious. The likely intent is to download and execute a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 4

PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.

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