Malicious PDF — malware analysis report

Static analysis result for SHA-256 07a3f951a641521e…

MALICIOUS

PDF

53.8 KB
MD5: e2c5a60329329e3313d2efa1cff83bf3 SHA-1: 6f1f0ec0341a8880740054484fdf4e5bb3758ccb SHA-256: 07a3f951a641521ed919632d620d9f76a3f49848f3fb69216c9b2bf10e94fa37
116 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, identified by multiple heuristics, including PDF_JAVASCRIPT and PDF_JS_EXPLOIT_CLUSTER. This JavaScript is likely responsible for exploiting a vulnerability within the PDF reader to execute arbitrary code. The presence of an embedded URL suggests a potential download or redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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://www.bitstream.com
    • http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/2.6/
    • http://www.xfa.org/schema/xfa-template/2.6/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0012_000.js
3ddf3130c8895494e34c8c3b2708843e4bb44808e7564fb0295df9e5f6d0a8c2		 pdf-javascript-stream PDF /JS object 12 at offset 0xC3C2 4027 bytes
javascript_obj0012_001.js
a106a53b0727c4708073ec6abc5e931733d24cde180fd701f36359945f51d676		 pdf-javascript-stream PDF /JS object 12 at offset 0xC3E4 4913 bytes
font_00_sfnt_off0000032f.bin
010f608f87575ad8cd060deee465119c947e63eed31187b2928addbdade0e11f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32F 49224 bytes

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