Malicious PDF — malware analysis report

Static analysis result for SHA-256 50736d0e6cba36a8…

MALICIOUS

PDF

35.3 KB Created: 2021-06-18 13:36:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1337a8103a3c448cc6686360b6c9fd55 SHA-1: 53663e36b234c74baa7cec641e63946e6808c51d SHA-256: 50736d0e6cba36a8660bd4bc95eb7fb32a26f3b2cc3fe5a3714f58d87fe03745
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to known malicious infrastructure. The document body and embedded URLs reinforce this by advertising 'free generators' and 'hacks' for popular games like Roblox and Coin Master. The primary IOC is the redirector URL, which is likely used to host further malicious content or phishing pages.

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.co/app/431946152/roblox-drive-money-hack-game-hack In PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/hack-coin-master-for-iphone_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/avatar-roblox-game_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/make-free-robux_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/vip-roblox-free_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/hacks-roblox_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/coin-master-how-to-get-free-pet-food_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/free-spin-links-coin-master-october-30-2021_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/free-roblox-groups_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/free-robux-glitch-ios_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmparents.co.uk/admin/ckfinder/userfiles/files/robux-today_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_off00003111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3111 22640 bytes
SHA-256: dc70b866d3ce3d683af126847a519a2d9c818bd4d1a83b8563d693155bfca47a
font_01_sfnt_off000063b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B9 19432 bytes
SHA-256: 9caad96c541871d717c0c00df2b176273e7945b6a3acfd432551c66a5969dda3

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