Malicious PDF — malware analysis report

Static analysis result for SHA-256 26b57e41d336bb0c…

MALICIOUS

PDF

6.2 KB First seen: 2026-05-11
MD5: c2c1f9784be4094fad5cc65e542a69ee SHA-1: 7602de4249c63689b66e8714bede2d9a52de9a62 SHA-256: 26b57e41d336bb0cb207ef408560771f7f2c811c55b6bbe7d8e3ea4cc4becf26
148 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript with an eval() call, indicating an attempt to execute arbitrary code. This is a common technique for downloading and running a second-stage payload. While no specific URLs were extracted, the presence of JavaScript and the eval() function strongly suggests malicious intent. The benign URLs present are standard for PDF metadata and do not indicate malicious activity.

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) 679 bytes
SHA-256: 64eac5fc280129f37a4f28a61a5247a0ed24578c4fe4d09bdf6fcaecf8fccac3

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