Malicious PDF — malware analysis report

Static analysis result for SHA-256 598e00bb218d645e…

MALICIOUS

PDF

6.3 KB First seen: 2026-05-10
MD5: 210082902269f0889171c6b2f4fdef51 SHA-1: 4652ec462003caf2b9cdcb58ec8fc1d7a29a7eb9 SHA-256: 598e00bb218d645e66e3bf8ff58ff70f247e8bb6750a905ef0cae14a8b04639f
116 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 4

  • JavaScript action low 2 related findings PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules. (matched inside decoded stream)
  • 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.
    Matched line in script
    function enftg(hvxqeoi3){if(hvxqeoi3>92)hvxqeoi3--;return hvxqeoi3-42}function bpgqh(){if(isgngva==0){dqdndm2=enftg(erfqcm.charCodeAt(jrymiw4++));isgngva=6;}return ((dqdndm2>>--isgngva)&0x01);}while(yoezg--){i=0;while(fzyze[i]<0){if(bpgqh())i=-fzyze[i];else i++;}ywapkr8+=String.fromCharCode(fzyze[i]);}
  • 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. (matched inside decoded stream)
  • 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.w3.org/1999/02/22-rdf-syntax-ns# In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objstm_0024_00.bin pdf-objstm-decoded PDF /ObjStm 24 0 obj (inflated) 331 bytes
SHA-256: 0f0f7fdfb35a511c84334c4b5768e9fc7b7364e2bc71e465aa17edc8d60c04da