Malicious PDF — malware analysis report

Static analysis result for SHA-256 4253ce949317cb57…

MALICIOUS

PDF

46.3 KB Created: 2021-06-11 00:09:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-15
MD5: 5cc873c2c56edc4948620bafa6111d77 SHA-1: 749de812b272c01beb8551726e9e3c531d39159f SHA-256: 4253ce949317cb57b57a0fa8d5ce0e9261cadb0b96742cb90809d0eb3a690959
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/roblox-hack-csgo-game-hack In PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/minecraft-mod-menu_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-do-you-hack-roblox-kick-off_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-ro-ghoul-cheat-engine-hack_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/apps-for-free-robux_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
stream_004_off00004fcb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FCB 28888 bytes
SHA-256: d411b0ef2820b8eb45e57663518b1d01d8d7765f996d9f0167605b0d90f9a4e8
font_01_sfnt_off000091f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91F3 18468 bytes
SHA-256: 6cb53a304f11d288edeb81335f4e7c88ee022b29813356f24698fcffcf70a0a2