Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0fd438973eeee78…

MALICIOUS

PDF

6.0 KB First seen: 2026-05-11
MD5: c0d76c7fe5422c0e06a04953a2b4f37a SHA-1: ccc5eb66e91e9a7acb9c1bff290b810cde13f992 SHA-256: b0fd438973eeee787a4041954febc108b800c3bf42af974a9830bc207cff2c8b
148 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains an embedded JavaScript stream which includes an eval() call, indicating an attempt to execute arbitrary code. While the specific payload is obfuscated, the presence of JavaScript and the eval() function strongly suggests a malicious intent, likely to download and execute a second-stage payload. No specific malware family could be identified.

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
    eval(a);
  • 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) 351 bytes
SHA-256: 1fd662322a2ed19ffbc8b88e337613411fdf3b0d05a98fba19922ffd9f616ef1

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