Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d0d97421901994e…

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 03:19:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 75daf4a1667f4eac5f77601d2369de1e SHA-1: 39262471646f530a5e1db6fe7ed498de2ccc46e9 SHA-256: 7d0d97421901994e38f6c66b2f4b1de9ad7fa64112e379573ca4ceeaff9acd78
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document uses a lure related to obtaining free Minecraft Java, which is a common tactic for phishing and malware distribution. It displays a fake CAPTCHA or verification prompt to trick the user into clicking a malicious link. This link, http://netcdn.tw/app/479516143/how-to-get-minecraft-java-for-free-game-hack, redirects to a site likely hosting further malicious content or attempting to exploit the user. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/479516143/how-to-get-minecraft-java-for-free-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/roblox-points_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-phantom-forces-credit-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-admin-hack-script-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-profe_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/rblx-gg-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-gamepasses-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-powering-imagination-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-change-your-robux-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-roblox-ninja-legends_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-chromebook-exclusive-roblox-item_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/cars-watch-videos-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-server-side-roblox-executor_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/broken-bones-roblox-cheats_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_off000035ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35CE 22816 bytes
SHA-256: f700929815ab15e7afc5b368f89ac20d9385d388bdd0ffa24197fa3df96bdc12
font_01_sfnt_off0000690c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x690C 18444 bytes
SHA-256: ee0fd3b8161b5983970ad4bc3604837358645b2154b845f85ded903745611adb

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