Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2bd2bf61743885…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 14:35:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-21
MD5: f99acb08088023fda20d17ade3c6940c SHA-1: f8f93ed9fbafbd43f68e054d52c2e363a4292dd5 SHA-256: af2bd2bf61743885ef5416512c7261cabe3596a7fd45381d76384f910287c453
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/406889139/free-foxy-food-coin-master-game-hack In PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/cheats-for-prison-life-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/2021-roblox-hacks-february-2021_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/free-draw-1-roblox_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/how-to-get-free-roblox-inspect_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/roblox-meme-gui-free_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/free-shirt-design-maker-roblox_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/free-roblox-link_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/how-to-hack-robux-into-your-car_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/free-minecraft-worlds_GM479516143.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_002_off000031b4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31B4 22632 bytes
SHA-256: 1739cd897573ff53eee2b631682ec84f128138f8ccd74e0c793cd5f0d2286b18
font_01_sfnt_off0000644a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x644A 18564 bytes
SHA-256: af4d53c9d4850c84ea476dc8337184aeaf232e1c3d9d0e54b726c0ec8114b362

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