Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d8ca756be734a87…

MALICIOUS

PDF

34.5 KB Created: 2021-07-07 17:52:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-18
MD5: 2434d76987077df1986bf572d395ccce SHA-1: eb56015b1018c6ef7cb2cd66e5c2e6f265a3289e SHA-256: 5d8ca756be734a87a2ad27f4b93c764b2588c334a79fc63b5d15c387484bb93b
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/431946152/easy-ways-to-get-free-robux-game-hack In PDF document text
    • https://www.decorsofacile.com/uploaded_files/userfiles/files/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • https://www.decorsofacile.com/uploaded_files/userfiles/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://www.decorsofacile.com/uploaded_files/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.decorsofacile.com/uploaded_files/userfiles/files/robux-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.decorsofacile.com/uploaded_files/userfiles/files/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.decorsofacile.com/uploaded_files/userfiles/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://www.decorsofacile.com/uploaded_files/userfiles/files/roblox-free-items_GM431946152.pdfIn PDF document text
    • https://www.decorsofacile.com/uploaded_files/userfiles/files/roblox-scam_GM431946152.pdfIn PDF document text
    • https://www.decorsofacile.com/uploaded_files/userfiles/files/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • https://www.decorsofacile.com/uploaded_files/userfiles/files/your-life-free-trial-has-expired-roblox_GM431946152.pdfIn PDF document text
    • https://www.decorsofacile.com/uploaded_files/userfiles/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.decorsofacile.com/uploaded_files/userfiles/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.decorsofacile.com/uploaded_files/userfiles/files/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
    • https://www.decorsofacile.com/uploaded_files/userfiles/files/hack-roblox-admin-commands_GM431946152.pdfIn PDF document text
    • https://www.decorsofacile.com/uploaded_files/userfiles/files/how-to-hack-assassin-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.decorsofacile.com/uploaded_files/userfiles/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.decorsofacile.com/uploaded_files/userfiles/files/descargar-roblox-hack-adopt-me-para-pc_GM431946152.pdfIn PDF document text
    • https://www.decorsofacile.com/uploaded_files/userfiles/files/free-robux-live_GM431946152.pdfIn PDF document text
    • https://www.decorsofacile.com/uploaded_files/userfiles/files/robux-hack-no-download-apps_GM431946152.pdfIn PDF document text
    • https://www.decorsofacile.com/uploaded_files/userfiles/files/roblox-get-boombox-free_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_off000030f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F5 21940 bytes
SHA-256: 7384c36b5e1f4f95f7f8d72772db4e4e6233aea834904cff2fc314371875325e
font_01_sfnt_off00006151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6151 19196 bytes
SHA-256: 64e8f018724e62164b0ada1d77f482f882d8547e2dcd2accc6d14ba4748306e9

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