Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a4706fdeaca9a46…

MALICIOUS

PDF

6.2 KB First seen: 2026-05-10
MD5: 2a044d6ef135f32fa52211a1b0c18044 SHA-1: fa8a1d9100d939c5789b1279ddc11e53ec8c7d15 SHA-256: 3a4706fdeaca9a4638eb6582a3b513d0191754d6e50be57ca9ba3fb234eebf41
148 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript that is executed via an eval() call. This JavaScript is likely intended to exploit a vulnerability within the PDF reader to download and execute a second-stage payload. No specific malware family could be identified, and no malicious URLs or hashes were extracted.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9761

Heuristics 4

  • 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
    /*fGhkjkDFhkhsfd <FDSJHFhkjkjSDFkj> FDKLFJHklfkldshfSLDf*/ eval(hvkoa6); /*fGhkjkDFhkhsfd <FDSJHFhkjkjSDFkj> FDKLFJHklfkldshfSLDf*/
  • 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)
  • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objstm_0023_00.bin pdf-objstm-decoded PDF /ObjStm 23 0 obj (inflated) 597 bytes
SHA-256: a875c2b207b1263c34ea76d310f6c97a5b1a9acab169f4afa91dd30230b2fc48

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