Malicious PDF — malware analysis report

Static analysis result for SHA-256 8894a6647c8016b7…

MALICIOUS

PDF

44.7 KB Created: 2021-06-09 10:06:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ea470ded45c7d3c0b5b8277b34a28045 SHA-1: 5422862aad446e75b37d28bc159f0656086afa7b SHA-256: 8894a6647c8016b7788cf928f17deffcf92da519851d1a72e6a6472ebac95799
82 Risk Score

Malware Insights

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

The sample is a PDF document that displays a fake CAPTCHA or human verification prompt to trick the user into downloading a payload. It contains numerous embedded URLs, with one prominent URL pointing to a file named 'roblox-server-crash-hack-game-hack', suggesting a lure for game-related exploits. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/roblox-server-crash-hack-game-hack
    • https://tokunfome.com.br/images/coin-master-links-free-spins_GM406889139.pdf
    • https://tokunfome.com.br/images/coin-master-hacks_GM406889139.pdf
    • https://tokunfome.com.br/images/how-to-get-free-roblox-money_GM431946152.pdf
    • https://tokunfome.com.br/images/roblox-hacked-com-2021_GM431946152.pdf
    • https://tokunfome.com.br/images/how-to-get-java-minecraft-for-free_GM479516143.pdf
    • https://tokunfome.com.br/images/minecraft-dungeons-free-download-pc_GM479516143.pdf
    • https://tokunfome.com.br/images/free-robux-exe_GM431946152.pdf
    • https://tokunfome.com.br/images/coin-master-free-spins-link-download-hack_GM406889139.pdf
    • https://tokunfome.com.br/images/free-minecraft-website_GM479516143.pdf
    • https://tokunfome.com.br/images/coin-master-hack-tool-generator_GM406889139.pdf
    • https://tokunfome.com.br/images/no-scam-free-robux_GM431946152.pdf
    • https://tokunfome.com.br/images/game-hunters-coin-master_GM406889139.pdf
    • https://tokunfome.com.br/images/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • https://tokunfome.com.br/images/vortexx-how-to-get-free-robux_GM431946152.pdf
    • https://tokunfome.com.br/images/block-best-robux_GM431946152.pdf
    • https://tokunfome.com.br/images/how-to-get-free-robux-without-verifying-2021_GM431946152.pdf
    • https://tokunfome.com.br/images/free-coin-master-hacks-no-verification_GM406889139.pdf
    • https://tokunfome.com.br/images/free-robux-for-kids_GM431946152.pdf
    • https://tokunfome.com.br/images/free-roblox-shirts-templates_GM431946152.pdf
    • https://tokunfome.com.br/images/coin-master-hack-mod-apk-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050d7.bin
8ec4ea3a97c7f0297b4d5e4c56f2184d86db431b759e615785490b66da0d3312		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50D7 25188 bytes
font_01_sfnt_off00008b77.bin
f6df7818dd2b0b72729197113e724893d4ec175feb9f58cdb8b19ca671d4c121		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B77 18464 bytes

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