Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd981945e7b4f312…

MALICIOUS

PDF

6.7 KB First seen: 2026-05-11
MD5: a7b8e8ea02c5f48280822697a16030f1 SHA-1: 69d0b39cd068a5d29d91342626e1cce909de1bb2 SHA-256: dd981945e7b4f3125ab48d44dc6fb6067865c8d9d1ddc86ddbd1a982165cf247
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 JavaScript stream is obfuscated, as suggested by the PDF_UNESCAPE heuristic firing on a call to unescape() and the 'Script obfuscation indicators' static triage finding. This obfuscated script is likely designed to download and execute a second-stage payload. No specific family could be identified due to the obfuscation.

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
    return unescape(RandomVar22);
  • 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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

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 2472 bytes
SHA-256: 61bfb6460e03cb22de1eb306e7069e9283fd16c3b264800c1551a71331eb9ca1
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
stream_003_off000006be.js decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6BE 569 bytes
SHA-256: 7559b4336ddf6648712192e028cb3ff954b8fe6deddcac98e0659164ddda2fb0

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