Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d8444768200574…

MALICIOUS

PDF

35.4 KB Created: 2021-07-03 14:21:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-28
MD5: 539d96cdc9b09e65a28ddbf3fa23c7e4 SHA-1: 40ee505a42e43391871a860396d37e61b89d03d0 SHA-256: c5d8444768200574789c0b4287c0b659a00467fa5176a88e9c90e5236fc9ee10
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/479516143/minecraft-windows-10-free-with-java-game-hack In PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/is-minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-robux-for-everyone_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/como-obrtener-10000-robux-de-verdad-hack_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/coin-master-daily-free-spins-link-march-2021_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_off00003380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3380 22264 bytes
SHA-256: 25eba5ae3e75734d14e26136e3455d4d0a68899d6b725b3b8d6f336646b2b4db
font_01_sfnt_off000064e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E0 19256 bytes
SHA-256: 0962a3ef6155743e3b186a790cdec45821d78640f98d60abfc6623c3622a453e

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