Malicious PDF — malware analysis report

Static analysis result for SHA-256 04b3d1e9378bd68e…

MALICIOUS

PDF

45.4 KB Created: 2021-05-12 12:00:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a86f2d219eb90cfa95ee1f404d827b8d SHA-1: 7045e621ce53abddd66fdbc8b6f44207753d54d9 SHA-256: 04b3d1e9378bd68e0a9f0937a8b9282b0979fc148fc90f44dea374cc11236c8d
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick the user into clicking a malicious link. The primary link identified is https://netcdn.xyz/app/431946152/free-robux-mobile-game-hack, which likely leads to a secondary payload download. The document body contains garbled text but includes references to games and free items, consistent with a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/free-robux-mobile-game-hack
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/coin-master-free-spin-link-today-download_GM406889139.pdf
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/but-link-says-free-robux_GM431946152.pdf
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/cheats-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/free-spins-coin-master-2021-today_GM406889139.pdf
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/coin-master-hack-reddit_GM406889139.pdf
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/minecraft-for-free-games_GM479516143.pdf
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/roblox-free-models_GM431946152.pdf
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/can-i-get-minecraft-for-free_GM479516143.pdf
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/coin-master-free-blogspot_GM406889139.pdf
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/free-spin-link-coin-master_GM406889139.pdf
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/how-to-hack-minecraft_GM479516143.pdf
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/minecraft-for-chromebook-free_GM479516143.pdf
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdf
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/coin-master-free-spins-fb-champion_GM406889139.pdf
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/earn-robux-for-roblox_GM431946152.pdf
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/free-robux-games-on-roblox_GM431946152.pdf
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/free-robux-redeem-codes-2021_GM431946152.pdf
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/village-coin_GM406889139.pdf
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/free-coin-app_GM406889139.pdf
    • http://mamuhammadiyahnagahure.com/__statics/gudangsoal/files/coin-master-hack-with-facebook-login_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c0e.bin
4a67b4b0422a4760c9a917d10225b3e6dd2edff889a902e5b82b4abdb7b3d1f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C0E 24724 bytes
font_01_sfnt_off00008455.bin
889cfc2fd0afa9ea114d6666204c6ce0548d0aae2cba345827d317498c4c06bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8455 2984 bytes
font_02_sfnt_off00008e81.bin
0c312729e80e6e0ca2ee9f4904992f86151ccd5d23fc73e43cbe09e8497f8a48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E81 18404 bytes

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