Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd75ae105bd8f8f2…

MALICIOUS

PDF

45.5 KB Created: 2021-06-09 10:07:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-19
MD5: 453ebd1ed3acf32ed19a72759d7f1396 SHA-1: 957b2d114f32318640b9c50d86b3205a66341db8 SHA-256: cd75ae105bd8f8f263b8df06243d00c0c061186e3880472c0d7ff0f099beb07f
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/free-ghost-beret-roblox-game-hack In PDF document text
    • http://lib.vipklh.ru/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/spin-coin_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/pokemon-go-free-download-android_GM1094591345.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/robloxhacks_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/code-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/cheating-hacks-for-coin-master_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
stream_004_off00005122.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5122 26492 bytes
SHA-256: 9ee922ad5e485a6cec0656faa3afd08dd9f7fe3224a5edb85f0c20dce0ade88f
font_01_sfnt_off00008f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F88 18216 bytes
SHA-256: 21eb61d1a43d167ef79fdd79f6a0aa4e50f97a4ccb109f436ade4e1636506eeb

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