Malicious PDF — malware analysis report

Static analysis result for SHA-256 6243baffe8a6644b…

MALICIOUS

PDF

49.0 KB Created: 2021-06-10 21:05:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-05-29
MD5: 09b8b994cd59e89337a27b19d79e77e3 SHA-1: ba862e01d272aac211e6d0f143a4729dbc3315f3 SHA-256: 6243baffe8a6644b5c0fb839b8fd11b8e27d6d8bdacdf04c017b5cd0040af1d1
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/how-to-change-you-name-in-roblox-hack-game-hack In PDF document text
    • http://cintabaca.org/katalog//repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-free-followers-bot_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/wurst-minecraft_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/tiktok-free-download-for-android_GM835599320.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/pokemon-go-free-quick-catch_GM1094591345.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/derp-face-roblox-hacked_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/island-royale-roblox-hack-esp-script-pastebin_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/10-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/robux-withdraw_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/robux-cheat_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/daily-coin-master-link_GM406889139.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_004_off000051c1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51C1 27568 bytes
SHA-256: b887bb822c817175057ac91cb098b89e9b1af2215637c024570b5796f6750aea
font_01_sfnt_off00008fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FA8 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9993 19364 bytes
SHA-256: c24fc32a973a01f567302af3da08438c23a428416676ae9212635a2596041d42