Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fd51e108fa55220…

MALICIOUS

PDF

44.4 KB Created: 2021-05-14 19:43:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: da4a87b746760c31c8af1c1ff93037b2 SHA-1: 24270cdf2eecaf032519fa8d3dd82e45c84ccc9f SHA-256: 7fd51e108fa5522072f375049564c982cb7a6e9efcf39944bb24e9b5209cc1a5
82 Risk Score

Malware Insights

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

The PDF document contains a lure for 'free Robux' and displays a fake CAPTCHA to trick the user into clicking a malicious link. The embedded URL, https://netcdn.xyz/app/431946152/free-robux-no-human-verification-or-survey-2021-game-hack, is likely intended to lead to a further stage of infection or a scam. The document's structure and content strongly suggest a phishing or social engineering attack.

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 https://netcdn.xyz/app/431946152/free-robux-no-human-verification-or-survey-2021-game-hack
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coin-master-hack-game-download-mod-apk_GM406889139.pdf
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/how-to-free-robux_GM431946152.pdf
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coin-master-hacks-2021_GM406889139.pdf
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/minecraft-pe-hacks_GM479516143.pdf
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-spins-coin-master-cheat_GM406889139.pdf
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/how-to-get-coin-master-card-free_GM406889139.pdf
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-spin-link-for-coin-master_GM406889139.pdf
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-coin-and-spin-for-coin-master_GM406889139.pdf
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-robux-without-human-verification_GM431946152.pdf
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/how-do-we-get-free-robux_GM431946152.pdf
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coin-master-el-tiger-card-free_GM406889139.pdf
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-100-robux_GM431946152.pdf
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdf
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coin-master-100-free-spins-link_GM406889139.pdf
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-coin-master-spins-blog_GM406889139.pdf
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-hair-roblox-boy_GM431946152.pdf
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-robux-pastebin_GM431946152.pdf
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/how-to-hack-roblox-2021_GM431946152.pdf
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-robux-gift-card_GM431946152.pdf
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/appsmob-info-coin-master-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004da2.bin
d4ccf3a07b6974e99cd690b79f22f6f296f9a7a0ee36e4a7386cd25cc5e63abe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DA2 25748 bytes
font_01_sfnt_off0000874d.bin
08b2a18d96b3566ec838f0e87c4bb916e955b8f8af04b9064418114d078945b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x874D 19556 bytes

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