Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eea3747a7cf2578…

MALICIOUS

PDF

46.3 KB Created: 2021-05-11 17:00:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b588364b0361a8eab67882cf7b98d08d SHA-1: 476d69925881e4041461bc05854afce46c7a70de SHA-256: 4eea3747a7cf25781a1cd364a8f08a01eef29741d82312493b3babf0b09b45ad
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with the document. It also embeds external URIs, including one pointing to a suspicious domain, likely intended to download a second-stage payload. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8696

Heuristics 4

  • 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.xyz/app/431946152/withdraw-robux-game-hack
    • https://bancroftandsons.com/images/roblox-hair-for-free_GM431946152.pdf
    • https://bancroftandsons.com/images/how-to-block-someone-on-coin-master_GM406889139.pdf
    • https://bancroftandsons.com/images/coin-master-free-spins-app_GM406889139.pdf
    • https://bancroftandsons.com/images/minecraft-free-exe_GM479516143.pdf
    • https://bancroftandsons.com/images/hack-minecraft_GM479516143.pdf
    • https://bancroftandsons.com/images/get-free-robux-com_GM431946152.pdf
    • https://bancroftandsons.com/images/coin-master-home_GM406889139.pdf
    • https://bancroftandsons.com/images/free-minecraft-alt-accounts_GM479516143.pdf
    • https://bancroftandsons.com/images/free-ways-to-get-robux_GM431946152.pdf
    • https://bancroftandsons.com/images/master-coin-free-spin-daily_GM406889139.pdf
    • https://bancroftandsons.com/images/free-spin-link-for-coin-master_GM406889139.pdf
    • https://bancroftandsons.com/images/bit-ly-coin-master-hack_GM406889139.pdf
    • https://bancroftandsons.com/images/free-spins-on-coin-master-hack_GM406889139.pdf
    • https://bancroftandsons.com/images/coin-master-free-coins-and-spins-link-today_GM406889139.pdf
    • https://bancroftandsons.com/images/coin-master_GM406889139.pdf
    • https://bancroftandsons.com/images/coin-master-hack-no-human-verification_GM406889139.pdf
    • https://bancroftandsons.com/images/minecraft-com-free_GM479516143.pdf
    • https://bancroftandsons.com/images/free-spins-coin-master-2021_GM406889139.pdf
    • https://bancroftandsons.com/images/free-spins-and-coins-coin-master_GM406889139.pdf
    • https://bancroftandsons.com/images/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049ed.bin
92dcad169288dd7123e9dbd30661c461fc60e0156aa5c5a80996bd2bab679a70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49ED 25016 bytes
font_01_sfnt_off00008339.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8339 5696 bytes
font_02_sfnt_off0000904b.bin
1af1b50e13b79861841ce88764da910b9f7fb16252a783c49889fdff3a55bba6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x904B 19004 bytes

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