Malicious PDF — malware analysis report

Static analysis result for SHA-256 1912a8d8aed3766c…

MALICIOUS

PDF

32.9 KB Created: 2021-07-04 12:10:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-22
MD5: a4ff837c0e6dca42d5b6fdacd2329ba1 SHA-1: fb2a70601c343d0c2a1a02d084cbc923d84ddaf5 SHA-256: 1912a8d8aed3766c08c1165aa5d303df66cbf344f645941ecfe95000421366df
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • 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.
  • 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/1330123889/pubg-uc-ykleme-perdigital-game-hack In PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-gift-card-codes-2021-on-images_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-vip-link-for-power-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/vip-roblox-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/will-roblox-be-free-on-ps4_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-kohls-admin-infinite-cheat_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/flood-escape-2-infinite-jump-roblox-hack-pastebin_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-web-site_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/easy-robux-hack-on-ipad_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/cursed-roblox-outfits-free_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-with-jus-tusername_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-any-item-on-roblox-for-free-2021_GM431946152.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_off00002a54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A54 22528 bytes
SHA-256: f279451045481dcc2e105d7f6841e98017782805c822bf4ab696f4d98ca2519d
font_01_sfnt_off00005bc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC0 19192 bytes
SHA-256: cbd25e5b0b04cda4ecc2ddfc0ea8a33e6643e2a39ce5fb7413121c7f2b5b5ecd

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