Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce9cd6385f107dd9…

MALICIOUS

PDF

8.0 KB First seen: 2026-05-11
MD5: d7baacce62a3948349c90d92da997a9a SHA-1: df9db8c8c1b69cc708a14254b3f630b3339ae844 SHA-256: ce9cd6385f107dd93ff00662a12e3789ffdf3d86d8d710e003bd8ff747196d10
118 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF document contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream utilizes String.fromCharCode, suggesting obfuscation. While no specific malicious URLs or scripts were directly extracted, the presence of obfuscated JavaScript within a PDF is a strong indicator of a malicious intent, likely to download and execute a secondary payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9224

Heuristics 5

  • 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 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)
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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_002_off00000328.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x328 2892 bytes
SHA-256: 78da55284ea212a506a767bbcd1ffde5532b15105fa3a8de64aac8efdb41be34
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
objstm_0024_00.bin pdf-objstm-decoded PDF /ObjStm 24 0 obj (inflated) 331 bytes
SHA-256: b9380cdd390dc45960bde19a57d533d347c9a9af27146efed9e7aaa109cab6a7

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