Malicious PDF — malware analysis report

Static analysis result for SHA-256 d41924b46dda43cc…

MALICIOUS

PDF

46.0 KB Created: 2021-06-08 17:43:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 25a52d3d04779b247d890d13057b3eab SHA-1: e1eb3d77810d44645ef7e2d0c648c4e6308e3c14 SHA-256: d41924b46dda43cca38a172265dc68499d9283f1a1921a7ac8a45921dc98014a
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure and a call-to-action phrase, directing users to click on embedded URLs. The primary URL, https://netcdn.tw/app/431946152/roblox-all-free-items-2021-game-hack, is likely intended to deliver a malicious payload. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/roblox-all-free-items-2021-game-hack
    • http://lib-smansumsel.sch.id/repository/free-coins-for-coin-master_GM406889139.pdf
    • http://lib-smansumsel.sch.id/repository/spin-links-for-coin-master_GM406889139.pdf
    • http://lib-smansumsel.sch.id/repository/www-roblox-com-robux-free_GM431946152.pdf
    • http://lib-smansumsel.sch.id/repository/free-spin-coin-master-link-today_GM406889139.pdf
    • http://lib-smansumsel.sch.id/repository/roblox-rewards-robux_GM431946152.pdf
    • http://lib-smansumsel.sch.id/repository/moonactive-free-spins_GM406889139.pdf
    • http://lib-smansumsel.sch.id/repository/pubg-uc-price-in-uae_GM1330123889.pdf
    • http://lib-smansumsel.sch.id/repository/free-spins-coin-master_GM406889139.pdf
    • http://lib-smansumsel.sch.id/repository/coin-master-gold-cards-hack_GM406889139.pdf
    • http://lib-smansumsel.sch.id/repository/earn-free-robux-on-roblox_GM431946152.pdf
    • http://lib-smansumsel.sch.id/repository/best-site-for-free-coin-master-free-spin-link_GM406889139.pdf
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-food-on-coin-master_GM406889139.pdf
    • http://lib-smansumsel.sch.id/repository/get-free-robux-now_GM431946152.pdf
    • http://lib-smansumsel.sch.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • http://lib-smansumsel.sch.id/repository/minecraft-xbox-360-free_GM479516143.pdf
    • http://lib-smansumsel.sch.id/repository/best-free-robux-sites_GM431946152.pdf
    • http://lib-smansumsel.sch.id/repository/how-to-hack-roblox-account-step-by-step_GM431946152.pdf
    • http://lib-smansumsel.sch.id/repository/free-spin-in-coin-master_GM406889139.pdf
    • http://lib-smansumsel.sch.id/repository/free-flip-master-coins_GM406889139.pdf
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-2021-apk_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053c9.bin
3da081c16fe6541e0bbead4fde1bac9297454293fafb33041aabca84d00ef3d8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53C9 25624 bytes
font_01_sfnt_off00008feb.bin
fd39f61a7d83c27afe3e93444f4d6e81a8ae1aff6fb17fb7e3c629a1573e73aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FEB 18716 bytes

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