Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1e7711ec560dee…

MALICIOUS

PDF

6.8 KB First seen: 2026-05-11
MD5: 95de20969d6335cd1ad343e0222143a5 SHA-1: 751953ba8e520225d4218da0464aa9f58c2992a7 SHA-256: 9d1e7711ec560deea9ef2e1918645629e3372a3e0ba086b59c051319bfb55d80
150 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of an unescape() call within the JavaScript stream suggests obfuscation and potential malicious intent. While no specific URLs were found to be malicious, the embedded JavaScript streams themselves are suspicious artifacts. The script likely attempts to download and execute a second-stage payload, but its exact functionality is obscured.

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
    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_off00000327.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x327 1465 bytes
SHA-256: 129f86d72ae6557e68eff262d15356585a282221996f0addf384d3f3bf125df8
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_off0000070c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x70C 446 bytes
SHA-256: dda62728bb72a5e1c6771bdf48147da3248d56c64aaf248c1fbc25463057f11c

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