Malicious PDF — malware analysis report

Static analysis result for SHA-256 78226d5726f26e38…

MALICIOUS

PDF

48.3 KB Created: 2021-06-10 23:57:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-16
MD5: 68138070494ca636c50e7b1b3a8c7197 SHA-1: 8eaf9f5f2a5dd70deaf454ab8c0da7c92a26386d SHA-256: 78226d5726f26e385fb5426f0a80850adf5a3641845cc13fab789e9e923031af
260 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.tw/app/431946152/noto-clip-hacks-roblox-game-hack In PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/free-robux-redeem-codes-that-work_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/coin-master-codes_GM406889139.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/coin-free-spin_GM406889139.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/free-minecraft-mods-for-pc_GM479516143.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/gamesofficenet-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/roblox-character-free_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/free-spins-coin-master-2021-glitch_GM406889139.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/cheat-roblox-kick-player_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000529a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x529A 24920 bytes
SHA-256: d1d4ee734573c8b4e781e4fb0376c6ccf7800d824960ad562808fb51577261ed
font_01_sfnt_off00008c0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C0A 3928 bytes
SHA-256: e74f895bd9277b0b0162feefce2cb4a319c55226065157fb04455274bdd0ba98
font_02_sfnt_off000098f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98F2 18580 bytes
SHA-256: ca88fb6562eec4956bf1b3447ed99b5d2ee8f79cba409668b4b81cebd2f2dbf0

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