Malicious PDF — malware analysis report

Static analysis result for SHA-256 425171dc029e3ec3…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 13:35:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-16
MD5: 91b8a0386c260b7e8885b236415af6d7 SHA-1: 68d5c674d9597b707620e916ed223e10d1c8d491 SHA-256: 425171dc029e3ec3b7130ae2e265ce1e735552aa48ed38dddebfe27bd72a1805
260 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/406889139/www-coin-master-hack-com-game-hack In PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-hack-apk-latest-version-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/code-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-font-free_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/300-daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/get-robux-today_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/minecraft-hack-app_GM479516143.pdfIn 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
stream_004_off00004e2b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E2B 27140 bytes
SHA-256: d607a0d823684e2570e8ce59162325d87c7dea0a6d521030c06e687e6a860fa5
font_01_sfnt_off00008d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D5B 18336 bytes
SHA-256: 98b72f07f157dd659abe6b90bb941092e2c9091b5a98e7ee6b0c4f52701e1412

Open this report in the interactive analyzer, or submit your own file for analysis.