Malicious PDF — malware analysis report

Static analysis result for SHA-256 6679cdd7b122e743…

MALICIOUS

PDF

44.5 KB
MD5: 44e32055df62afbbe47b98f3ab24b89a SHA-1: 7dd53fdf300a85362bf3c005cbb4d62fb294aa8a SHA-256: 6679cdd7b122e74318bfc3806d7569569f5ba0d37e47bce6c3221d659f9880e8
118 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 as part of an exploit cluster targeting XFA forms. The JavaScript code appears to be obfuscated but is designed to download and execute a second-stage payload from a remote location. The presence of the 'ML_NYX_PDF_MALICIOUS' heuristic further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0007_000.js
2832b73aadd0749e7baaff0b5ed02b82c8b4ffcd34ac98cce99ba74e545bfa85		 pdf-javascript-stream PDF /JS object 7 at offset 0x86D 918 bytes
font_00_sfnt_off000010ba.bin
044efaa0fcddad6a1afc97a6bd112675dff8d542f6a622fb73e7eb17d43d90f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA 65932 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.