Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b653ac2caa4fb61…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 23:55:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-17
MD5: 0475b1f7fa486082e99500e55d1b9671 SHA-1: 888625eb7c9bee658cfe3743a53f2cd8f45c2868 SHA-256: 2b653ac2caa4fb6121d12aa106a6730c7117d67aaabc71125885e323c68c193c
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/431946152/free-robux-generator-for-roblox-2021-game-hack In PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/pubg-uc-gift-card-free_GM1330123889.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/roblox-free-to-play-game_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-4-mobile-24-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/roblox-how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-coins-and-spins-blogspot_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_off0000305e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x305E 21176 bytes
SHA-256: d5997f3388015c19763d63b7b10f55cf37d451229f2d8e6cbf142a5256e67226
font_01_sfnt_off00005e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E69 19296 bytes
SHA-256: 1c5b5ef18537994d2b9d4bcfadda653dfd61b801510ea22c778e1317dc9212ff