Malicious PDF — malware analysis report

Static analysis result for SHA-256 47bd99ba7a7249f6…

MALICIOUS

PDF

7.0 KB First seen: 2026-05-10
MD5: 1897153d2e415ff9ac54101f1e6aefe4 SHA-1: 56fdf491ef3d9b48ec119f785fefa7f03e98b2a4 SHA-256: 47bd99ba7a7249f6e94318d89f51c41cf1ed307a631414edc75bc4cc24564017
150 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream is obfuscated and utilizes the unescape() function, suggesting an attempt to hide malicious code. While no specific malicious URLs or payloads were directly extracted, the presence of obfuscated JavaScript points to a likely attack pattern involving the execution of arbitrary code or exploitation of PDF reader vulnerabilities. The benign URLs present are standard RDF and Adobe XMP namespaces and do not indicate malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9825

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
    RandomVar1=unescape(RandomVar1);
  • 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_off00000326.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x326 2309 bytes
SHA-256: ee01a63e3a14a0628ed1fcbbc8037935e3d13e78de217b4b4a54609c76f80227
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
stream_003_off0000081e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x81E 442 bytes
SHA-256: 86237bf7244a3525185dbd7ce5e5f835170169b90ca8c375a2ffd6712e2f46f9

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