Malicious PDF — malware analysis report

Static analysis result for SHA-256 478f1f28b890fd3d…

MALICIOUS

PDF

36.3 KB Created: 2021-07-01 14:51:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-20
MD5: a8857f4ebd042932ce37931d5d41f4fc SHA-1: 562af1cb4f4808585881f9b15f4f8dfda8d4c93a SHA-256: 478f1f28b890fd3dc73097de3e888170c1a20d8902901712591f544d91f6778d
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.co/app/431946152/who-hacked-my-main-group-chat-roblox-game-hack In PDF document text
    • http://www.5oceansoman.com/uploaded_files/userfiles/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://www.5oceansoman.com/uploaded_files/userfiles/files/cheat-roblox-tower-defense_GM431946152.pdfIn PDF document text
    • http://www.5oceansoman.com/uploaded_files/userfiles/files/roblox-wall-hack-download_GM431946152.pdfIn PDF document text
    • http://www.5oceansoman.com/uploaded_files/userfiles/files/hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://www.5oceansoman.com/uploaded_files/userfiles/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://www.5oceansoman.com/uploaded_files/userfiles/files/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • http://www.5oceansoman.com/uploaded_files/userfiles/files/february-2021-robux-cheats_GM431946152.pdfIn PDF document text
    • http://www.5oceansoman.com/uploaded_files/userfiles/files/mc-update_GM479516143.pdfIn PDF document text
    • http://www.5oceansoman.com/uploaded_files/userfiles/files/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • http://www.5oceansoman.com/uploaded_files/userfiles/files/counter-roblox-hack-aimbot-2021_GM431946152.pdfIn PDF document text
    • http://www.5oceansoman.com/uploaded_files/userfiles/files/robux-free-site_GM431946152.pdfIn PDF document text
    • http://www.5oceansoman.com/uploaded_files/userfiles/files/free-t-shirts-roblox-to-look-like-a-pro_GM431946152.pdfIn PDF document text
    • http://www.5oceansoman.com/uploaded_files/userfiles/files/hack-roblox-comment-passer-a-travers-des-murs_GM431946152.pdfIn PDF document text
    • http://www.5oceansoman.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.5oceansoman.com/uploaded_files/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.5oceansoman.com/uploaded_files/userfiles/files/free-roblox-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://www.5oceansoman.com/uploaded_files/userfiles/files/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • http://www.5oceansoman.com/uploaded_files/userfiles/files/client-minecraft_GM479516143.pdfIn PDF document text
    • http://www.5oceansoman.com/uploaded_files/userfiles/files/just-go-to-mobi-hack-robloxhack_GM431946152.pdfIn PDF document text
    • http://www.5oceansoman.com/uploaded_files/userfiles/files/free-robux-hack-2021_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_off000032fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32FD 22664 bytes
SHA-256: e4ee11a9c33392c26cd798c787d45a9dd02bccd6d0b58e7bf33bf1d48ff3dca4
font_01_sfnt_off000065b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B5 20108 bytes
SHA-256: 6f98e296834615adbead80725b279234a9e9fe2a954a5db3abd2d52e896ada3c

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