Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fff630934ad3dc1…

MALICIOUS

PDF

40.0 KB Created: 2021-05-30 21:43:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cc064fb97f8d900404ee3386db5ef6d4 SHA-1: 2cae6d32e9ed3c96a2ef438a77e8458012c7bd51 SHA-256: 1fff630934ad3dc1d09cd7b7649531fd5ec410b1cf8baa39c32b225bdb04c0aa
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA and a call-to-action to trick users into clicking a link for a "Free Robux Generator". The embedded URLs and document body content strongly suggest a social engineering lure aimed at driving traffic to potentially malicious websites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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-generator-2021-game-hack
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/real-minecraft-for-free_GM479516143.pdf
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/freer-pro-tiktok-fans_GM835599320.pdf
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/minecraft-realms-free-codes_GM479516143.pdf
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/can-you-download-minecraft-for-free_GM479516143.pdf
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/free-minecraft-games-for-kids_GM479516143.pdf
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/roblox-fun-com-free-robux_GM431946152.pdf
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/minecraft-free-download_GM479516143.pdf
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/games-that-give-you-free-robux_GM431946152.pdf
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/coin-master-free-spins-and-coins-daily_GM406889139.pdf
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/minecraft-realms-free-trial_GM479516143.pdf
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/free-spins-coin-master-unlimited_GM406889139.pdf
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/minecraft-mac-free_GM479516143.pdf
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/free-tiktok-followers-no-downloads_GM835599320.pdf
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/minecraft-free-download-unblocked_GM479516143.pdf
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/free-coin-master-coins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003d35.bin
3c58bdd3190c9d2cacb23651327477dc2d647e86076096e5c3bc98322b8319a5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3D35 25808 bytes
font_01_sfnt_off000078e5.bin
fca1806ffff7593a0a2d811b077fe14576afb362c0c2e8ffc695fbf8edc3964d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78E5 18748 bytes

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