Malicious PDF — malware analysis report

Static analysis result for SHA-256 191f035a210f9246…

MALICIOUS

PDF

46.5 KB Created: 2021-06-04 02:40:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-22
MD5: e700a836eee1001dd13e6ded8b78ace1 SHA-1: 6aa205b328ffc5666e42d09850db2d4d775be452 SHA-256: 191f035a210f92462cd59c623c7ba3577421a476b470abb78d8b82f3cc4d5f21
200 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://netcdn.online/app/431946152/can-you-actually-get-free-robux-game-hack In PDF document text
    • http://oca.undil.tl/repository/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/mcpe-download_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/ww-roblox-come_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-hack-co_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/ww-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/minecraft-switch-free_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-200-spin-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E0D 23992 bytes
SHA-256: d3b234c4b2d7a9e14986d81fb6cdbc3dd7ff7c8e84f4797facfd027b4e542591
font_01_sfnt_off00008486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8486 3884 bytes
SHA-256: 64ea6bfd232c3abde76d8b86727203bfa3f935a5783cd0c1f642cf6d3fb42b29
font_02_sfnt_off0000912e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x912E 18764 bytes
SHA-256: 47da03a4981b0a54a8018003304e59ec7e3f87382350c48cbaac3b3d81608ccf