Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef85bfb534a2d679…

MALICIOUS

PDF

37.1 KB Created: 2026-02-22 15:51:21 UTC First seen: 2026-02-23
MD5: 4e7f0868d1d60a702c07c0c5e252183a SHA-1: 3298502cd9edf270b7de3ef92fa1729d8872e413 SHA-256: ef85bfb534a2d679261902aab71e24dde3c5c9b7950e300dd0df298dfddddc02
70 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment

This PDF contains embedded JavaScript that displays an alert message in Italian, instructing the user to open the document in a browser. This is a common lure to bypass PDF reader security and redirect users to a malicious URL. The ML classifier strongly indicates maliciousness, and the PDF structure suggests a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 5

  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 37 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • JavaScript action low 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://bociking.netlify.app/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0005_000.js
578fc8de6e928a575e0bbea33f45500a773ce9654d4069132b7d7e759cc50c6b		 pdf-javascript-stream PDF /JS object 5 at offset 0x169 70 bytes

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