Malicious PDF — malware analysis report

Static analysis result for SHA-256 721ef5e8463dc9f2…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 22:47:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 22483c63b7632828cc7e0631962fbe91 SHA-1: 18c595284c4aa167c6f37e69e0902369034ef012 SHA-256: 721ef5e8463dc9f2ff4fd788fb5fb0dea9d31a738dc6644b91efd632c8d7b276
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/406889139/wwwcoin-master-hack-game-download-game-hack PDF link annotation
    • https://lib.btkljogja.or.id/repository/hacking-roblox-with-code-noclip-windows-7_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-codes-2021-not-used-october_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-dinosautr-simulator-hacks_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/hacked-server-roblox-id_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/xcuteur-bandit-pour-scrpit-hack-roblox_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/como-tener-hack-para-en-roblox_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/robux-free-no-vertifacation_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/https-nhelprobloxcom-hc-fre_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/freerobux-hack-us_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-use-hack-tools-in-roblox_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-spin_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/minecraft-free-install_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-college-textbooks-tiktok_GM835599320.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_off0000328b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x328B 22732 bytes
SHA-256: bd40a9ee37117f6312be8f6caf46934cbae1bdf2d10c6ef63a79a9ceb491755e
font_01_sfnt_off0000655b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x655B 19040 bytes
SHA-256: 5d6d92bc86e4eabd8213e7cde02281e89b90155e041e4321562c6fe931876c9b

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