Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4957204f443ff6c…

MALICIOUS

PDF

732 B First seen: 2026-05-10
MD5: 0dd133689088a0202dadebf2308fc46f SHA-1: 2405a8976dd359ccc9292da77fee5b1f73f77c04 SHA-256: e4957204f443ff6c9093c6ce7973cd745d77b64cf8b54bf82f43e329002b25b0
66 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. The ML classifier also flagged the file as malicious with high confidence. The extracted JavaScript code, while simple, demonstrates an attempt to execute code within the PDF viewer, likely as a precursor to a more complex malicious action.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX
    Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
  • JavaScript action low 1 related finding PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0006_000.js pdf-javascript-stream PDF /JS object 6 at offset 0x156 74 bytes
SHA-256: f3eadeca3f68642573858bc83b45fa8aac44174c28f320df06fc8b670058a9d8
Preview script
First 1,000 lines of the extracted script
app.alert({cMsg: 'OK', cTitle: 'Testing', nIcon: 3});

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