Malicious PDF — malware analysis report

Static analysis result for SHA-256 425aa11bf9a46990…

MALICIOUS

PDF

35.7 KB Created: 2021-06-29 05:42:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-15
MD5: 1955f97bc9aeb5dde9505455d6397257 SHA-1: 57805e6a43b4f6845761ae7193aac13b9124bf2d SHA-256: 425aa11bf9a46990cce74258c2f958bc4ff94447cb8a20503628a46c870f2a90
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.co/app/431946152/how-to-get-free-robux-2021-today-game-hack In PDF document text
    • https://lib.btkljogja.or.id/repository/app-master_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-free-faces-catalog_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/watch-ads-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-not-crash-when-you-hack-in-roblox_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-spain_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-lots-of-robux-free-2021_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-free-robux-2021-real_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/cheats-for-money-on-roblox-for-bloxburg_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/hack-para-island-royale-roblox_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/assasin-roblox-hack-script_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-roblox-redeem-codes-2021_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_off00003268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3268 22372 bytes
SHA-256: b4a327dad5d83f9501272a0e24de0148e74b27537399c2ad24bbed6d54ef4bda
font_01_sfnt_off00006435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6435 19740 bytes
SHA-256: fbde936931bd939485f738ffbe495b95026bbfd70fd0becd9d413a8d2af3376a

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