Malicious PDF — malware analysis report

Static analysis result for SHA-256 81592d88e65cc354…

MALICIOUS

PDF

43.6 KB First seen: 2026-06-10
MD5: 9e1894228ea32c19aa07438adde8add0 SHA-1: 343561f96615719f73cf30ccea254540c195ec4f SHA-256: 81592d88e65cc354fcf3460ab0b48fd24b5d5dd81576f8e3457c5f92b557e3f1
70 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0329

Heuristics 4

  • Image-heavy PDF hides clickable URL with PDF string escapes high PDF_ESCAPED_URI_IMAGE_LURE
    PDF is image-heavy with little real text and its clickable HTTP(S) URI is encoded with PDF octal escapes. This combination is common in credential-phishing PDFs that render a screenshot-like prompt and obscure the destination from simple URL extractors.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 2 image(s), only 0 text block(s), carries a click-outward action, and is only 43 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://login.microsoftonline.com/common/oauth2/v2.0/authorize?scope=openid&prompt=none&client_id=dff569e2-a4b0-4b27-b0ea-5385fb913357&state=bmartin@affinityhealthcenter.org In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00000c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC74 15128 bytes
SHA-256: bb441f7246ba2485c3923a27fb4caeb186f8a20d7c704c029d13fd9fddf6ce91
font_01_sfnt_off00002894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2894 17056 bytes
SHA-256: 66e6cc3a4f27089d2a85a366f204cf2ca9a99e0f4a3b82eec28e71fe7e11d50e