Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc9e90e1b2d6a410…

MALICIOUS

PDF

34.4 KB Created: 2021-06-22 07:08:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f6a53820ad4fc393472e672336534ccc SHA-1: 62f316011cc4f5aaf2f555a3c34f67c14e6732b3 SHA-256: fc9e90e1b2d6a4107ba7fa0e0c4b2d48a322099276d329feb850dbc8d6d3bd7e
82 Risk Score

Malware Insights

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

The PDF document displays a fake CAPTCHA to trick the user into interacting with it, likely to initiate a download. The embedded URL points to a resource related to 'roblox-hacks-robux', suggesting a lure for game-related cheats or exploits. While no scripts were explicitly extracted, the PDF structure and heuristics indicate it's designed to exploit user interaction, potentially leading to client-side execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/roblox-hacks-robux-2021-game-hack
    • https://bartonprivate.com.au/sites/default/files/files/how-to-setup-a-minecraft-server-for-free_GM479516143.pdf
    • https://bartonprivate.com.au/sites/default/files/files/coin-master-free-spins-2021-link_GM406889139.pdf
    • https://bartonprivate.com.au/sites/default/files/files/free-robux-just-enter-username-and-password_GM431946152.pdf
    • https://bartonprivate.com.au/sites/default/files/files/daily-free-spins-for-coin-master_GM406889139.pdf
    • https://bartonprivate.com.au/sites/default/files/files/master-free-spin_GM406889139.pdf
    • https://bartonprivate.com.au/sites/default/files/files/roblox-games-online-free-no-download_GM431946152.pdf
    • https://bartonprivate.com.au/sites/default/files/files/online-coin-master-hack-here_GM406889139.pdf
    • https://bartonprivate.com.au/sites/default/files/files/free-coins-coin-master_GM406889139.pdf
    • https://bartonprivate.com.au/sites/default/files/files/pig-master-coin-master-free-spin_GM406889139.pdf
    • https://bartonprivate.com.au/sites/default/files/files/free-robux-games-that-actually-work-2021_GM431946152.pdf
    • https://bartonprivate.com.au/sites/default/files/files/free-hair-roblox_GM431946152.pdf
    • https://bartonprivate.com.au/sites/default/files/files/pokemon-go-free-and-nintendo-switch_GM1094591345.pdf
    • https://bartonprivate.com.au/sites/default/files/files/free-coins-coin-master-link-today_GM406889139.pdf
    • https://bartonprivate.com.au/sites/default/files/files/how-to-get-a-bunch-of-free-robux_GM431946152.pdf
    • https://bartonprivate.com.au/sites/default/files/files/free-promo-codes-for-robux_GM431946152.pdf
    • https://bartonprivate.com.au/sites/default/files/files/how-to-get-free-robux-august-2021-27th_GM431946152.pdf
    • https://bartonprivate.com.au/sites/default/files/files/how-to-hack-robux_GM431946152.pdf
    • https://bartonprivate.com.au/sites/default/files/files/25-free-spins-coin-master_GM406889139.pdf
    • https://bartonprivate.com.au/sites/default/files/files/how-to-buy-robux-for-free_GM431946152.pdf
    • https://bartonprivate.com.au/sites/default/files/files/how-to-get-coin-master-free-spin-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031bd.bin
3cd7298fd2cb5123646fa7c56054ac892e21e71adc7c35288362f59c3f2f65bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x31BD 21460 bytes
font_01_sfnt_off000060db.bin
1d128787c03f7092054dfb7cad9683f6ece7a48ff86922c93b0fc3900ed604e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x60DB 19200 bytes