Malicious PDF — malware analysis report

Static analysis result for SHA-256 6761906ad4421297…

MALICIOUS

PDF

44.5 KB
MD5: 29cf5b8e53733849b5d19879912e5574 SHA-1: 9b904ae4ca9b028863eff3d76a8a746a23ecf549 SHA-256: 6761906ad4421297f406c851094d44c29c4302820ed333c7c5c39c5e0a5b9010
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 that is obfuscated but appears to be designed to download and execute a second-stage payload. The ML classifier and heuristics strongly indicate malicious intent, specifically targeting PDF vulnerabilities. The embedded URL http://www.bitstream.com is the only IOC that is not confirmed benign.

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
17abed7308ed48f60b942caf5113d095bd2de72e1df300bc25df936248b96a15		 pdf-javascript-stream PDF /JS object 7 at offset 0x86F 969 bytes
font_00_sfnt_off000010d1.bin
044efaa0fcddad6a1afc97a6bd112675dff8d542f6a622fb73e7eb17d43d90f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1 65932 bytes

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