Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e8505bbed759cd0…

MALICIOUS

PDF

8.8 KB First seen: 2026-05-10
MD5: 6b91e28f41fa20e328d3c0a9e3a8edb0 SHA-1: 34bb29d79685a2925c2410de1fb49b8b0c102297 SHA-256: 3e8505bbed759cd0f28ddea21b8dfa71b5f50a7206014f9678d563213e549676
148 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF document 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 attempting to execute arbitrary code, possibly to download and run a second-stage payload. No specific family could be identified, and no malicious URLs or other IOCs were extracted.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7056

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(variable3);
  • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00000329.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x329 4373 bytes
SHA-256: f13f9c3ca65b1cc9d3aabac3556a04c1ec22f89b4b744ab21a79c44c11abc1e3
objstm_0024_00.bin pdf-objstm-decoded PDF /ObjStm 24 0 obj (inflated) 388 bytes
SHA-256: 3c174342183e17be41afab1207637b75362368060da223468fa7f6352cae3945

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