Malicious PDF — malware analysis report

Static analysis result for SHA-256 24bfe87ea6bb6563…

MALICIOUS

PDF

6.1 KB First seen: 2026-05-10
MD5: 879a8cfbc4691fcdcc72094250883055 SHA-1: 668f16d5a07d240b3234a20756a6d3f93584299a SHA-256: 24bfe87ea6bb656369154cfbaafb64518f40c7ff37fd6db284ac3df68308bba1
148 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript with a high-severity 'eval()' heuristic firing. This indicates the script is likely attempting to execute arbitrary code. The presence of JavaScript actions and embedded JS streams further supports this. The script's intent is to download and execute a second-stage payload, though the specific URL or execution method could not be fully reconstructed due to obfuscation. No specific malware family could be confidently identified.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9761

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
    eval(variable3);
  • 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_0023_00.bin pdf-objstm-decoded PDF /ObjStm 23 0 obj (inflated) 500 bytes
SHA-256: ae73a59028c4ac91ac3460024736371ba87a63caf5b1a23780d601aef492056b

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