Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b6c110573e2b247…

MALICIOUS

PDF

34.5 KB Created: 2021-06-25 18:44:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ea1ba4fc3b81ee2e65eecfac3bf870c5 SHA-1: 3b2c58fcb94098063c1ae611962bd774deaadbab SHA-256: 9b6c110573e2b24796051401fa6a8dad6a0eaa151a883ee57e4953bc1fb840d8
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.co/app/431946152/new-roblox-logog-gives-free-robux-robuxian-game-hack PDF link annotation
    • https://foc.vn/public/upload/files/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • https://foc.vn/public/upload/files/optifine-mcpe_GM479516143.pdfIn PDF document text
    • https://foc.vn/public/upload/files/robux-prices_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/hack-coin-master-apk-31_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-tiktok-likes-no-human-verification-or-download_GM835599320.pdfIn PDF document text
    • https://foc.vn/public/upload/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/hack-roblox-com-2021_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/khaos-free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-get-free-hats-on-roblox-2021_GM431946152.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_off00002fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FBF 22284 bytes
SHA-256: e826c855d2cf4ea8830255020651030aa0a6dd30b54186f31eadcfb386ff19c7
font_01_sfnt_off0000612f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612F 19188 bytes
SHA-256: 7eda7f481b87149b4631f355025717eaa0e3aab467e5b31cb528ab4ed9f47439