PDF malware analysis — malicious · 72a97fd1a28f419a

MALICIOUS

PDF

259 B

MD5: d062e7ff0cad847bee875d172dbac019 SHA-1: 9176763078850f91025657eeddfb76f864616bf4 SHA-256: 72a97fd1a28f419ae5595383aee282825f0c356893fa499d310340faeccbed51

148 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript that utilizes an eval() call to execute code. This script attempts to open a document from the URL https://burp-collaborator-url, likely to download and execute a second-stage payload. The ML classifier strongly indicates maliciousness, and the JavaScript execution points to exploitation for client execution.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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
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.
Embedded URL info EMBEDDED_URL

One 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 https://burp-collaborator-url

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