Malicious PDF — malware analysis report

Static analysis result for SHA-256 af20bb167d46d0c7…

MALICIOUS

PDF

48.4 KB Created: 2021-06-03 10:07:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-21
MD5: 7068d0d1270b9320c51168da3a9f8c60 SHA-1: 211e570ace947ef2abb632fb4091dc8096e7758c SHA-256: af20bb167d46d0c732b8c945b2baabe7f67bce1b0fccb5e228a59d7b8b606096
200 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • 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.online/app/406889139/coin-master-app-hacks-game-hack In PDF document text
    • http://perpus.polimarim.online/repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-spins-coin-master-links-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-cheats-free_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/moon-active_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/grab-points-login_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-root-hack_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_off0000537f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x537F 27708 bytes
SHA-256: 948f2128d42aceb9167e61d8e83e1dcc8846e4eab95f549de6c64d68c8a20854
font_01_sfnt_off00009221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9221 2812 bytes
SHA-256: 869414959d7b492e0f799b560e1731e3ab498bd286c28e9f0d2ec33d9b6cf53d
font_02_sfnt_off00009bc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BC0 17892 bytes
SHA-256: 38569bedbe5996f2827c101678e23308efeb8581fe2a57cd3cb5ddc3bbed0d22

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