Malicious PDF — malware analysis report

Static analysis result for SHA-256 65bd57d50f47eada…

MALICIOUS

PDF

47.0 KB Created: 2021-06-04 04:30:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 92cfd88cd2b2519e7c11c3dfe84d15c9 SHA-1: 821c31b7ed728f649f2c24a4e7ee6468c3189b6b SHA-256: 65bd57d50f47eadaf16697837bcedfa2ff2eb19f2b62d42f63edf00bdcef56bc
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure and embedded URLs, indicating an attempt to trick users into visiting malicious websites. The ML classifier also flagged this PDF as malicious. The primary malicious URL identified is https://netcdn.online/app/431946152/roblox-hack-site-game-hack, which likely serves as a landing page for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/431946152/roblox-hack-site-game-hack
    • http://perpustakaan.sman2bondowoso.sch.id/repository/60-free-spins-coin-master_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-free-spins-2021-generator_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/get-free-spins-coin-master-october-2021_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/how-to-install-minecraft-for-free_GM479516143.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/robux-fun-hack_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/minecraft-bedrock-download_GM479516143.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-free-spin-app-reviews_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/moonactive-coin-master-free-spins-link_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/robux-page_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/roblox-com-hack_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-hack-apk-ios-download_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/robux-hack-me_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/rbl-gg-free-robux_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-free-spins-link-today-haktuts_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/spin-coin-master-free_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-fan-page_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/minecraft-windows-10-edition-hacked-client_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050ae.bin
53c90154ba6dd1ce805e060b7459601e2a9f2e0019c2724600e78485ddd0c103		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50AE 25112 bytes
font_01_sfnt_off00008a5b.bin
4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A5B 2816 bytes
font_02_sfnt_off0000946c.bin
baa68e8b80fe17984eb0f5893287011db8c451c65a8bba41303beeb2aadfa952		 pdf-font-stream PDF embedded font (sfnt) at offset 0x946C 18408 bytes

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