Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d8438900f8b9f03…

MALICIOUS

PDF

36.2 KB Created: 2021-07-16 05:57:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-18
MD5: d8d5c73d91e8c294ff3cd2cc5d689157 SHA-1: 512f82ab599b4b43dbb16f6df17b42801af68335 SHA-256: 5d8438900f8b9f03733c5db452e46722192a5a3cf6b612d435e797edb0e44a4f
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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/479516143/how-to-download-minecraft-java-edition-for-free-game-hack In PDF document text
    • http://tileworld.com.au/files/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/freespinandcoin_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://tileworld.com.au/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/dragon-ball-advanced-battle-roblox-hack_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/roblox-how-to-get-free-robux-without-hacking_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-spins-gratis_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/free-robux-live_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-stop-attack-hack_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-cheat-free_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://tileworld.com.au/files/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • http://tileworld.com.au/files/how-to-get-robux-without-paying_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_off000037db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37DB 22516 bytes
SHA-256: 7140d440d2c7a0c8c7fa758b4f469e055237c8dd8c4e5f6ae9581d400e7739bd
font_01_sfnt_off00006a07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A07 18572 bytes
SHA-256: 372950b09ae56ccdc45362242de33d197b063ee091c9df90a0e91acdbb6b8628

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