Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebeee4496f4a2497…

MALICIOUS

PDF

43.4 KB Created: 2021-06-04 00:54:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a46813eed1947da4badda652f89c64aa SHA-1: f69e4bca0e6239428a6503fb8dff27c4dfe04cb8 SHA-256: ebeee4496f4a2497bae966aaad5ac3012f80a7d6d1f148bc69cdc15917733d86
122 Risk Score

Malware Insights

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

The sample is a PDF document that impersonates Facebook to lure users with a 'Coin Master Free Spins' theme. It presents a fake CAPTCHA or human verification prompt, encouraging users to click a malicious link. The embedded URL, https://netcdn.online/app/406889139/coin-master-free-spins-app-game-hack, is likely intended to lead to malware download or a credential phishing page. No scripts were extracted, but the document's structure and heuristics strongly indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/406889139/coin-master-free-spins-app-game-hack.
  • 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.online/app/406889139/coin-master-free-spins-app-game-hack PDF link annotation
    • http://elibrary.perludem.org//repository/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/daily-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/pokemon-go-free-meltan-box_GM1094591345.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-daily-spin-link_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-2021-5-3-17_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-2021-spin-link_GM406889139.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_off0000503a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x503A 24428 bytes
SHA-256: 82e0c4a6e71b6c3caa4af0a07e7e7253d62d51dc4d3caecc20cf3ed23715acf6
font_01_sfnt_off00008830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8830 17884 bytes
SHA-256: 21af4872a04c62c178ac31651a333ecdcea5bb1ed4ceeeef1956d42e8fc37ea8

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