Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde057cd6cdcd921…

MALICIOUS

PDF

33.4 KB Created: 2021-07-06 16:45:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 175ead9c56f550599d5ee11dc86e446e SHA-1: 10f1d688d1ca740ffd5a6d11ce40c5c8fef89924 SHA-256: fde057cd6cdcd921457dca8a8f297d3127e9bd22b691938666f7980b744bc1af
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/free-robux-rewards-game-hack PDF link annotation
    • http://library.futureuniversity.com/repository/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-free-working-gift-card-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-without-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/10-000-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-roblox-accounts-with-obc-lifetime-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-account_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-free-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/pokemon-go-free-and-pokeball-plus_GM1094591345.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-admin-for-every-game-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-robux-hack-2021-lenovo_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-promocode-hack-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/reverse-a-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/pokemon-go-free-trade-evolve_GM1094591345.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_off00002f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F0D 21276 bytes
SHA-256: bc7fcd3891aa7f8143ac1c94af670f7635347421424c46b204ff7ac7d9446c02
font_01_sfnt_off00005d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D51 19056 bytes
SHA-256: 5fd868e4ea22638534696fb0cd66a74addf388445670d9d0517416fd5b37f315

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