PDF malware analysis — malicious · 3d7d04e412f38e7b

MALICIOUS

PDF

266.3 KB Created: 2010-11-29 10:29:36 Authoring application: FPDF 1.6

MD5: 2fc70a3faf001e96b95f679484995f98 SHA-1: 8484194be2e374a394b3874f70aef3d3f7650f9e SHA-256: 3d7d04e412f38e7bab6da7f7af0d2e55e298b74c5a4c5d69a12d2d039d90d621

74 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The sample is a PDF file flagged as malicious by an ML classifier. It contains embedded JavaScript and utilizes ASCIIHexDecode filters, indicating an attempt to obfuscate malicious code. The presence of XFA forms further suggests a complex document structure often used for exploitation. The embedded JavaScript is the primary mechanism for delivering the malicious payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 5

ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
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 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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