Malicious PDF — malware analysis report

Static analysis result for SHA-256 7936519b4f7cbfce…

MALICIOUS

PDF

42.4 KB Created: 2021-05-13 00:14:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-15
MD5: b9f5365805f526625b101a8ad4ef30e7 SHA-1: 6438a3aff3b657216d783489a50a5fa60e020ccb SHA-256: 7936519b4f7cbfce11ae9cceab01bf36be131d15c22df3c16920b7762251930c
200 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/roblox-points-game-hack.
  • 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.xyz/app/431946152/roblox-points-game-hack In PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/coin-master-redeem-code-free_GM406889139.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/rewards-robux_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/hack-avatar_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/free-roblox-gfx_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/minecraft-noob-vs-pro-vs-hacker_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_003_off00004a4e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A4E 24804 bytes
SHA-256: 8f8aa99023290fd91d284150d356b068e0d25ed02e931023588d1a4863ece90f
font_01_sfnt_off00008385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8385 18160 bytes
SHA-256: a57327a258e3f03f6c415903b67d078454eac437ea2773aceae9ab9387be6de9

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