Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccd0bfe74bfc3baf…

MALICIOUS

PDF

6.9 KB First seen: 2026-05-10
MD5: 3dc1893a5d402a413f82cd59d06276b9 SHA-1: 37296de63ed9a9fe15f7850a20981602afc18674 SHA-256: ccd0bfe74bfc3bafbf80a4557695c2c8a7dcb7d1793eae50745510f8710de691
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 JavaScript stream utilizes the unescape() function, a common technique for obfuscating malicious code within PDF documents. This suggests an attempt to exploit PDF vulnerabilities to deliver a payload. No specific family could be identified due to the obfuscation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9802

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_off00000345.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x345 1465 bytes
SHA-256: a07fa025ebebf0f93c014900058357957e4a0d64a9921a64bfd0179e2efe7ca5
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_off0000072b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x72B 442 bytes
SHA-256: 1eb653f54f5c1a4ffc7e3169b9a883d63321264d9454e02bc1f87656e8602132

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