Malicious PDF — malware analysis report

Static analysis result for SHA-256 53ed362ff5b3f945…

MALICIOUS

PDF

44.1 KB First seen: 2026-06-11
MD5: eb44eea4b84aa939408b82dac98b1a6f SHA-1: 65be178c949d891c02905a3423f5ea33660e8814 SHA-256: 53ed362ff5b3f9458fd708e2e424ad1522a36596f1359201e6ad6627981c09e9
130 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0014

Heuristics 5

  • Invisible/repeated PDF links deliver payload file critical PDF_REPEATED_PAYLOAD_LINK_LURE
    PDF uses invisible link annotations and points to a direct payload download. Repeated invisible links or lure-like payload names such as document/unlock/verify archives match malware-delivery PDF carriers where the page is only a prompt and the real payload is fetched from the linked URL.
  • 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 44 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=64c564fa-a6b9-4db7-8984-14e0b7854169&state=bcook@colonnaship.com 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_off00000c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC50 15168 bytes
SHA-256: 4019286f57098e5cde61ff64d21f46e73b4da7b3bee9f180170266ebcfafd342
font_01_sfnt_off00002893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2893 17020 bytes
SHA-256: 5c3fd361b25404dd1388a761164bfcc24aa90b322aaa9e092786f63764ae0c3b