Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee64433469416ad6…

MALICIOUS

PDF

227.1 KB Created: 2021-07-06 06:29:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 928568ef75d9ee54c8b2e38a47f8fffd SHA-1: 8cf7f774ba74edc5229159e171f51af6f67521c7 SHA-256: ee64433469416ad64240deef4c36550e67edac881305f8828fe4e42dede67401
172 Risk Score

Malware Insights

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

The PDF document uses a 'free game hack' lure to trick users into clicking a link. This link leads to a fake CAPTCHA and a prompt to install a browser extension, a common tactic for credential theft or malware delivery. The document body and heuristics strongly indicate a social engineering attack aimed at tricking the user into a malicious download or installation.

Machine Learning

  • Nyx PDF Classifier clean score 0.0118

Heuristics 7

  • 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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/1094591345/pokemon-go-free-legendary-hack-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-pastebin-youtube_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-make-free-shirts-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-hack-2021-legit-yt_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-red-shirt-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-links-that-don-t-expire_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-cheat-in-roblox-pet-simulator-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/telecharger-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-hackprogamers-com_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
stream_023_off00032092.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32092 25576 bytes
SHA-256: a1edfb7afe5527c2723b7fd4e643483c0f6c8333748a2892ae47626a99da7967
font_01_sfnt_off00035c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35C92 18712 bytes
SHA-256: af7a2e3b2640d4497da894e6b628dd74126dc5c643d51a34774be53d96d4fc2e

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