Malicious PDF — malware analysis report

Static analysis result for SHA-256 478d4427091d6b33…

MALICIOUS

PDF

36.7 KB Created: 2021-07-09 22:06:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-20
MD5: c032dd9478032416e753ea6e843a19ff SHA-1: e366e35ef3958ea439ef8c6c424530f54f1cdea8 SHA-256: 478d4427091d6b33e587948347b074264c3fe8545e55b0bfd32403276cec5564
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/how-to-change-your-username-on-roblox-for-free-game-hack In PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/free-robux-promo-codes-2021-no-inspect_GM431946152.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/download-apps-for-robux_GM431946152.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/how-to-cheat-in-levels-booga-booga-roblox_GM431946152.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/play-coin-master_GM406889139.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/roblox-cheat-engine-never-patched-updated-2021-18_GM431946152.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/free-face-roblox_GM431946152.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/roblox-free-ply-no-download_GM431946152.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/free-coin-master-gold-cards_GM406889139.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/minecraft-on-computer-free_GM479516143.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_off00003762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3762 22336 bytes
SHA-256: 00243f1a02d557feead54fa209ec204e50e1998aae0b52194e188d70945dc2ec
font_01_sfnt_off00006928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6928 19540 bytes
SHA-256: 13561b44f61144c121be84d59be9fad9902bdfea6fe0fd721d4b8ce19c369a19

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