Malicious PDF — malware analysis report

Static analysis result for SHA-256 4788bd0b94ea3113…

MALICIOUS

PDF

34.1 KB Created: 2021-07-07 06:09:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-20
MD5: 6bd4c3444308178b4c3e9f8f0f66d051 SHA-1: acc8a6bbf6e7cbfc90c478d5cfea8fc5a60f303f SHA-256: 4788bd0b94ea3113bc5a392e59d62184d9cca1d396db8484f442296e75ade3d3
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/406889139/install-free-game-coin-master-game-hack In PDF document text
    • http://ggmtc.net/userfiles/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/minecraft-beta-free_GM479516143.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/how-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-robux-no-downloads-2021-real_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-fun-free-spins_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/how-to-hightspeed-roblox-with-cheat-engine-windows10universal_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-hack-app-ios_GM406889139.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_off00002fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC7 22620 bytes
SHA-256: 95ec371cf71d1ec12c5cb96027eaff791edc29230764b1c0657c390e336ebb38
font_01_sfnt_off0000627f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x627F 18332 bytes
SHA-256: d212333c85aa31425f07fcb274d9f5b35260b329917ccb36e51ab60c49de7971