Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a22e8c9bcfb098d…

MALICIOUS

PDF

6.1 KB First seen: 2026-05-11
MD5: a48f7b21131342604a5a688e8b3207fa SHA-1: 9ee6cd95808484c006ebac7e32c9ec750f42eb3c SHA-256: 8a22e8c9bcfb098de7f88697d8cd619016e28c1dc5ed4077370ade5b56c963b6
148 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 presence of a PDF_EVAL heuristic firing suggests that the JavaScript code is likely being used to execute arbitrary commands or exploit a vulnerability within the PDF reader. No specific URLs or file paths were extracted, and the document body was not sufficiently informative to determine a specific lure. The JavaScript's exact function could not be determined due to obfuscation or truncation.

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(o+'text');
  • 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) 440 bytes
SHA-256: 06e64c97fe26e0dd5ebf71d97b19e08e25131f9f2d8c4501a8393457a0aebb19

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