Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b680e59d19acc78…

MALICIOUS

PDF

33.9 KB Created: 2021-07-03 11:32:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-17
MD5: 8ab45780b24d55b1ddfdc8fd11a46ef7 SHA-1: 0cd372bb8714846008bc99ae9f17bf0dbc91672e SHA-256: 2b680e59d19acc787657d2e42e6bd9fe1676fdf4a5d3ef913a22a7ba9da1a917
200 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://netcdn.tw/app/431946152/free-robux-without-offers-game-hack In PDF document text
    • http://librarysenior.com//repository/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/haktuts-coin-master-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-cards_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/no-human-verification-robux-free_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-roblox-gfx_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/kachifpro_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-coin-master-coins-and-spins_GM406889139.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
font_00_sfnt_off00002d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D8A 22124 bytes
SHA-256: 5ee5fb27701dc16d73cfbdc57e960eeea790ba50c8afbe4e08c9bfbdc4dfa60c
font_01_sfnt_off00005eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAF 19304 bytes
SHA-256: d28279064c80375efd82c55b38a8139998c8ec291e9a82c1a232f0005e70f64e