Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b047ec1ac8ef2d…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 21:27:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 18aa6137b748f094401e2dc40dfcd9b9 SHA-1: e745d91fc14efe10c2d4811512e764382d162966 SHA-256: 79b047ec1ac8ef2d9720a7f7defc260d66caa3a4ff65307242514cf8a80edcc0
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/coin-master-spin-link-today-game-hack PDF link annotation
    • https://c2o-library.net/catalog/repository/free-robux-generator-no-survey-mac_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/mcpe-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/real-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-hack-roblox-for-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/youtube-hacks-for-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-alt-accounts-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-roblox-accounts-2021-november_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-114-download_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-roblox-code-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/cheat-codes-for-assassin-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-people-hack-into-your-roblox-account_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_off00002f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5B 23024 bytes
SHA-256: 9cee7bca308a4bf3b426964a5ed74ceb676190e42e92ab82dcec6dac4e4f4a3e
font_01_sfnt_off00006323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6323 18536 bytes
SHA-256: 232cb4b515db04c7b0e85e36ce0db153ce2fb992ec8f88a884e5f1f80d4c2854

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