Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d38c83f16730f4f…

MALICIOUS

PDF

44.6 KB Created: 2021-06-07 05:57:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-14
MD5: 90ba6606fa8f175a23e9c928b9841c43 SHA-1: 40f694a477a0cc8dade16a2718ba7b2d7a7b24c0 SHA-256: 0d38c83f16730f4fdf0211b2a18d9ffd38c41299f94783a7a43a58d89746d7f5
200 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.
  • 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.tw/app/431946152/roblox-avatar-creator-free-game-hack In PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/coin-master-extra-spins_GM406889139.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/coin-master-hacking-news_GM406889139.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/get-free-coin-master_GM406889139.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/hacking-apps-for-roblox_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
stream_004_off000050f4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50F4 26684 bytes
SHA-256: 83fd471f74cc0ab353febf117ebb9d6182c8614184b97ee32816ad4041eea9bc
font_01_sfnt_off00008b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5A 18396 bytes
SHA-256: 6a469d95b096006573e8a0d9970e31991ca25090fb48be2a0cebe292f4f54d3c