Malicious PDF — malware analysis report

Static analysis result for SHA-256 4253bfbf7fe8db71…

MALICIOUS

PDF

44.5 KB Created: 2021-05-12 12:31:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-16
MD5: 4f604d4d991f5deeb97b9258af24a712 SHA-1: a2b7598dd0834687a920813a21e5b20fa9e7ed09 SHA-256: 4253bfbf7fe8db71b7476efb82f9f6ede6e5d1e9f71906c03331495fdc51b337
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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 https://netcdn.xyz/app/406889139/coin-master-daily-free-spins-link-2021-game-hack In PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/minecraft-survival-free_GM479516143.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/get-robux-today_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-ios-hack-download_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/pig-master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/roblox-gift-card-online-free_GM431946152.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_003_off0000479a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x479A 24376 bytes
SHA-256: 44b1ba8d9c697e7646344b93c7d50f2acb39894b7ecdcaa7f7d818b8f8a5d125
font_01_sfnt_off00007f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F41 2944 bytes
SHA-256: fcfcd28869b8d6c7503d63ed8d48371ec5b580fea2733193e2acbb82b3d30a76
font_02_sfnt_off0000896b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x896B 18880 bytes
SHA-256: 4ccb81aabfc378a65bbb004da1df6276046c1b1923188410bd025f5007717b79

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