Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea3146430775965…

MALICIOUS

PDF

42.4 KB Created: 2021-05-17 16:32:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: df7e8d0e6fe69dc8050d9322e8ff4877 SHA-1: 5b3ab7f08c2cceb18429567c1170d7dbb420f248 SHA-256: 2ea3146430775965620ec0b23975cfa29641bca8085b70274ac2b67de597df7e
82 Risk Score

Malware Insights

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

The PDF document presents itself as a "Hacks Para Roblox" download, but contains a fake CAPTCHA lure to trick users into executing malicious content. The ML classifier strongly flagged this PDF as malicious, and it contains an external URI pointing to a potential payload. While no scripts were directly extracted, the PDF structure and heuristics suggest it is designed to exploit user interaction to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/hacks-para-roblox-game-hack
    • https://www.cgalgeria-dubai.com/userfiles/files/free-robux-that-actually-works_GM431946152.pdf
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-hack-ios-cydia_GM406889139.pdf
    • https://www.cgalgeria-dubai.com/userfiles/files/hack-crack-for-coin-master-currency_GM406889139.pdf
    • https://www.cgalgeria-dubai.com/userfiles/files/twitter-coin-master-free-spins_GM406889139.pdf
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-hack-app-for-iphone_GM406889139.pdf
    • https://www.cgalgeria-dubai.com/userfiles/files/spin-link-coin-master_GM406889139.pdf
    • https://www.cgalgeria-dubai.com/userfiles/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdf
    • https://www.cgalgeria-dubai.com/userfiles/files/hack-coins-in-coin-master_GM406889139.pdf
    • https://www.cgalgeria-dubai.com/userfiles/files/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdf
    • https://www.cgalgeria-dubai.com/userfiles/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdf
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-daily-free-spins-link-2021-today_GM406889139.pdf
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • https://www.cgalgeria-dubai.com/userfiles/files/mcpe-hack-client_GM479516143.pdf
    • https://www.cgalgeria-dubai.com/userfiles/files/free-robux-apps-that-work_GM431946152.pdf
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-spin-free_GM406889139.pdf
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master_GM406889139.pdf
    • https://www.cgalgeria-dubai.com/userfiles/files/roblox-promo-codes-free-robux_GM431946152.pdf
    • https://www.cgalgeria-dubai.com/userfiles/files/roblox-hax_GM431946152.pdf
    • https://www.cgalgeria-dubai.com/userfiles/files/how-to-get-to-village-3-in-coin-master_GM406889139.pdf
    • https://www.cgalgeria-dubai.com/userfiles/files/games-that-can-be-hacked_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000492e.bin
6aee7bfec391c289a07b634b0d41500ff59555b50f882c7ad45b595337ba2def
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x492E 25188 bytes
font_01_sfnt_off00008309.bin
2c3591d0816fe2ec07885ff461cab1f1278707ef551a51e26631ad2b93349e2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8309 18336 bytes