Malicious PDF — malware analysis report

Static analysis result for SHA-256 93dfe8f0bbb81df8…

MALICIOUS

PDF

6.6 KB First seen: 2026-05-10
MD5: 50c0acdcaa3d561d2af1fc72196a12d7 SHA-1: dd2199de21f8d951bdf99f409b109740dbd66406 SHA-256: 93dfe8f0bbb81df894532fcb05ba17bdf2d1172d1a3119039470dd866c682e67
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 and uses an unescape() call, suggesting an attempt to hide malicious code. While no specific malicious URLs or scripts were directly extracted, the presence of obfuscated JavaScript points towards an attack pattern aimed at exploiting PDF vulnerabilities or delivering a secondary payload. The benign URLs present do not contribute to the maliciousness of the file.

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
    function RandomVar8(RandomVar9){return unescape(RandomVar9.replace(/d6H4n3Q1F9v5/g,'%u'));}var RandomVar3 = RandomVar8('d6H4n3Q1F9v554EBd6H4n3Q1F9v5758Bd6H4n3Q1F9v58B3Cd6H4n3Q1F9v53574d6H4n3Q1F9v50378d6H4n3Q1F9v556F5d6H4n3Q1F9v5768Bd6H4n3Q1F9v50320d6H4n3Q1F9v533F5d6H4n3Q1F9v549C9d6H4n3Q1F9v5AD41d6H4n3Q1F9v5DB33d6H4n3Q1F9v50F36d6H4n3Q1F9v514BEd6H4n3Q1F9v53828d6H4n3Q1F9v574F2d6H4n3Q1F9v5C108d6H4n3Q1F9v50DCBd6H4n3Q1F9v5DA03d6H4n3Q1F9v5EB40d6H4n3Q1F9v53BEFd6H4n3Q1F9v575DFd6H4n3Q1F9v55EE7d6H4n3Q1F9v5 …
  • 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 2043 bytes
SHA-256: fa529305336815bf437b01623051cd50c4cb32abd8551af48f6533d5bac9b9c9
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
objstm_0024_00.bin pdf-objstm-decoded PDF /ObjStm 24 0 obj (inflated) 331 bytes
SHA-256: dd82d7e084c5c7654b1ad13c5776651cd9642e61a6894ca6fb34af4f600f37dd

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