Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc67f814dd54024a…

MALICIOUS

PDF

47.4 KB Created: 2021-06-10 22:09:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 36b3ec7d840ab1e9aa291f75a73dec86 SHA-1: 54bb9b9c35a4e6d609a99f81c7fffae717e3a2fe SHA-256: dc67f814dd54024a57a364e918dc17ecb73fed4f7f9dae2d4534b961e9294385
122 Risk Score

Malware Insights

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

This PDF document contains a fake CAPTCHA lure, designed to trick users into clicking malicious links. The primary link directs to a URL associated with game hacks, a common lure for distributing malware. Multiple other URLs were extracted, many related to game cheats and generators, suggesting a campaign focused on enticing users with free in-game items or cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.tw/app/431946152/groups-that-give-free-robux-every-day-2021-game-hack PDF link annotation
    • http://italymania.ru/images/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • http://italymania.ru/images/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://italymania.ru/images/free-kak-roblox_GM431946152.pdfIn PDF document text
    • http://italymania.ru/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://italymania.ru/images/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://italymania.ru/images/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://italymania.ru/images/free-robux-generator-with-roblox-quiz_GM431946152.pdfIn PDF document text
    • http://italymania.ru/images/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://italymania.ru/images/how-to-get-free-robux-simple-and-easy_GM431946152.pdfIn PDF document text
    • http://italymania.ru/images/roblox-tracker_GM431946152.pdfIn PDF document text
    • http://italymania.ru/images/free-stuff-to-get-in-roblox_GM431946152.pdfIn PDF document text
    • http://italymania.ru/images/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://italymania.ru/images/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://italymania.ru/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://italymania.ru/images/coin-master-reward-link-2021_GM406889139.pdfIn PDF document text
    • http://italymania.ru/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://italymania.ru/images/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • http://italymania.ru/images/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://italymania.ru/images/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://italymania.ru/images/minecraft-fly-hack_GM479516143.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_004_off00004fb2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FB2 28652 bytes
SHA-256: 5c690818bd27e35bacac30e4cae8bbf771e7820c7a2e1dfd507cd636e54b858c
font_01_sfnt_off00009299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9299 19672 bytes
SHA-256: 7c45a21a5a19c2dee5b243a08ed817a8ba81702a796cb9600fa602b5dbdc672e

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