Malicious PDF — malware analysis report

Static analysis result for SHA-256 63cbf0b763d413d4…

MALICIOUS

PDF

45.6 KB Created: 2021-05-10 22:41:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: acc40d80b64ce0516842be28e80c713f SHA-1: c3a7f23035f7959aa53bbbb4ee537c279a5b1940 SHA-256: 63cbf0b763d413d4290b2aa84ffbf58e7ed718d37d89dd26af21b639ea915a21
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document displays a fake CAPTCHA to trick users into clicking a link, which is a common social engineering tactic. The embedded URI points to a URL that likely serves as a download source for a second-stage payload. No scripts were extracted, but the presence of a fake CAPTCHA and external links suggests a malicious intent to deliver further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/how-to-become-a-hacker-in-roblox-game-hack
    • https://mawaridschools.com/uploaded_files/userfiles/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • https://mawaridschools.com/uploaded_files/userfiles/files/coin-master-download-hack-ios_GM406889139.pdf
    • https://mawaridschools.com/uploaded_files/userfiles/files/master-coin-hack_GM406889139.pdf
    • https://mawaridschools.com/uploaded_files/userfiles/files/40-free-spins-coin-master_GM406889139.pdf
    • https://mawaridschools.com/uploaded_files/userfiles/files/roblox-army-free-robux_GM431946152.pdf
    • https://mawaridschools.com/uploaded_files/userfiles/files/microsoft-rewards-robux_GM431946152.pdf
    • https://mawaridschools.com/uploaded_files/userfiles/files/roblox-free-body_GM431946152.pdf
    • https://mawaridschools.com/uploaded_files/userfiles/files/earn-robux-by-watching-ads_GM431946152.pdf
    • https://mawaridschools.com/uploaded_files/userfiles/files/how-you-get-robux_GM431946152.pdf
    • https://mawaridschools.com/uploaded_files/userfiles/files/get-free-food-in-coin-master_GM406889139.pdf
    • https://mawaridschools.com/uploaded_files/userfiles/files/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdf
    • https://mawaridschools.com/uploaded_files/userfiles/files/how-to-hack-coin-master-spin-ios_GM406889139.pdf
    • https://mawaridschools.com/uploaded_files/userfiles/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdf
    • https://mawaridschools.com/uploaded_files/userfiles/files/free-robux-group_GM431946152.pdf
    • https://mawaridschools.com/uploaded_files/userfiles/files/how-to-get-free-robux-easy-no-download_GM431946152.pdf
    • https://mawaridschools.com/uploaded_files/userfiles/files/roblox-free-robux-hack_GM431946152.pdf
    • https://mawaridschools.com/uploaded_files/userfiles/files/can-you-give-me-free-robux_GM431946152.pdf
    • https://mawaridschools.com/uploaded_files/userfiles/files/can-you-really-hack-coin-master_GM406889139.pdf
    • https://mawaridschools.com/uploaded_files/userfiles/files/robux-free-online_GM431946152.pdf
    • https://mawaridschools.com/uploaded_files/userfiles/files/free-spins-coin-master-blogspot_GM406889139.pdf
    • https://www.roblox.co
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047e1.bin
9b5a51c8559c97fa283a4c04cfca2c42243374a3465eec709f11a46e12039ab8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47E1 25116 bytes
font_01_sfnt_off000081a9.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81A9 5696 bytes
font_02_sfnt_off00008ebb.bin
64431d83c1c466192ca6f90c953545fb4db60ca1c30fe2a26ad653d3315a559e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EBB 18608 bytes

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