Malicious PDF — malware analysis report

Static analysis result for SHA-256 624feba007d780b0…

MALICIOUS

PDF

48.4 KB Created: 2021-06-09 16:21:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-05-29
MD5: 3804e6b1a14b476af92c8ff20407e323 SHA-1: f4a0d5e73fb9b2d70537d7be9a48f7e35c8ad865 SHA-256: 624feba007d780b0b3128fc0c4f5bfe9f2532276e331261b96c5678532538ac9
220 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-hoodie-t-shirt-free-shipping-game-hack In PDF document text
    • http://library.futureuniversity.com/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-game-hacking_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/blox-fun-info_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/pubg-uc-buy-online-pakistan_GM1330123889.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/pokemon-go-free-promo-codes-2021_GM1094591345.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-hats-and-gear-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-now_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_004_off0000525c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x525C 26320 bytes
SHA-256: 911a7c77b06caae58b6a962f10e897051b9a722763ec934b00d6d3c7c3c80b6e
font_01_sfnt_off00008ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EE1 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off000098a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98A3 18976 bytes
SHA-256: e8cf18f9ef789cd9d768184b65b5f8108c32a04b1ada93b59ba872827e869f1b