Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bfa315150da13c6…

MALICIOUS

PDF

53.5 KB
MD5: 984db06753888d56cc05d2d3fec3da0e SHA-1: eed72e4fca4ff7d5641ae0f369f39fa92923ec9b SHA-256: 5bfa315150da13c6a059304fa116074eb45c986649e519df4d99b1b11f4e910a
116 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The critical heuristic 'PDF_JS_EXPLOIT_CLUSTER' combined with 'PDF_XFA' and embedded JavaScript streams indicates a likely exploit. The JavaScript code, although obfuscated, is designed to execute arbitrary code, suggesting it acts as a downloader for further malicious content. The presence of an unknown reputation URL further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
125fd46dc455745d36ea31d3208f551c55a5c5c705575d6176ed97f250cfa571		 pdf-javascript-stream PDF /JS object 12 at offset 0xC3C2 3775 bytes
javascript_obj0012_001.js
891ecd14f28a001b733400ffed76755eaabbd75f63068ed42a9a0be10ada5f86		 pdf-javascript-stream PDF /JS object 12 at offset 0xC3E4 4661 bytes
font_00_sfnt_off0000032f.bin
8b2513ae93533b311b7d18a2d5f4ab6fc1ac276e5822a6c26cb6458443b1e427		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32F 49224 bytes

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