Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf58cdeca3bdecb6…

MALICIOUS

PDF

32.4 KB Created: 2021-07-24 05:03:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fb8ebd9997d465d672596e9797c1a5da SHA-1: c93183b25868e12550b75e6e610cb9ddf1b20d85 SHA-256: cf58cdeca3bdecb6fe7fb30dfb8df544838bad6937c7697ff1c9ea770b1f2b2b
82 Risk Score

Malware Insights

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

The document displays a fake CAPTCHA and includes a call-to-action to trick the user into clicking a link. This link, 'http://netcdn.tw/app/431946152/free-robux-codes-2021-game-hack', likely leads to the download of a malicious payload. The document body content and embedded URLs suggest a lure related to free in-game currency or items.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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 http://netcdn.tw/app/431946152/free-robux-codes-2021-game-hack
    • https://www.latinquasar.org/images/free-minecraft-server-hosting_GM479516143.pdf
    • https://www.latinquasar.org/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • https://www.latinquasar.org/images/is-it-possible-to-get-free-robux_GM431946152.pdf
    • https://www.latinquasar.org/images/how-to-get-free-robux-2021_GM431946152.pdf
    • https://www.latinquasar.org/images/robux-free-2021_GM431946152.pdf
    • https://www.latinquasar.org/images/free-robux-websites-that-actually-work-2021_GM431946152.pdf
    • https://www.latinquasar.org/images/get-free-tiktok-likes_GM835599320.pdf
    • https://www.latinquasar.org/images/minecraft-windows-10-edition-free-download_GM479516143.pdf
    • https://www.latinquasar.org/images/minecraft-multiplayer-free_GM479516143.pdf
    • https://www.latinquasar.org/images/how-to-get-minecraft-for-free-on-phone_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000294a.bin
3c1ec17ef97b7cfb822fc76d9a3d1986e14ee7932e5ec64425023d407117dc39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x294A 22184 bytes
font_01_sfnt_off00005ab3.bin
86719edcafa38007f3fc56311acd0ad5bd2c3683937e8590d35305e3fc241c35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB3 18776 bytes

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