Malicious PDF — malware analysis report

Static analysis result for SHA-256 a36dca6b8032aee6…

MALICIOUS

PDF

6.5 KB First seen: 2026-05-10
MD5: 71d36e003d5354be8fafbc166879511a SHA-1: 47c228a1e4e48425fcfa1298224ff8f8b4addbd3 SHA-256: a36dca6b8032aee6ff771642e5be58772af1e7bc396e013cb9aa01213c156876
150 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The script is obfuscated, as suggested by the PDF_UNESCAPE heuristic and the 'Script obfuscation indicators' detail. The primary function of the script appears to be obfuscation and potential execution of further malicious code, though the exact payload is not discernible due to the obfuscation. No external URLs were found to be malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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
    payload=unescape(payload);
  • 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_off00000321.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x321 663 bytes
SHA-256: e8733f06e5eb11a7da431c229ff2295f933faf383581511206ebe0ac1586b9cb
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 eval/decoder/string-building token(s).
stream_003_off000005dd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5DD 441 bytes
SHA-256: 97bcfc8edae9b03dbd8ba451dfaf2f8afe03d14a77386b45ca1f2ed1f85a15d9

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