Malicious PDF — malware analysis report

Static analysis result for SHA-256 086dab46fa9e5be9…

MALICIOUS

PDF

48.5 KB Created: 2021-06-04 04:55:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0226ad58dc100f7d2e4005be171cc9ab SHA-1: c5389a4706b8fe8734e5278bfe76025152e1d914 SHA-256: 086dab46fa9e5be956c4cc01dcd8323bf9c5971c20dfec485c82e0e44c6f7df7
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick users into clicking a link, likely to download a malicious payload. The embedded URL `https://netcdn.online/app/431946152/who-to-get-free-robux-game-hack` is directly associated with this lure. While no scripts were extracted, the PDF structure and heuristics strongly suggest a social engineering attack aimed at users seeking in-game currency.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/who-to-get-free-robux-game-hack
    • https://perpustakaan.stieppi.ac.id/repository/roblox-lawsuit_GM431946152.pdf
    • https://perpustakaan.stieppi.ac.id/repository/free-roblox-toy-codes-not-used_GM431946152.pdf
    • https://perpustakaan.stieppi.ac.id/repository/free-robux-without-human-verification-2021_GM431946152.pdf
    • https://perpustakaan.stieppi.ac.id/repository/minecraft-pe-hack-client-ios_GM479516143.pdf
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-hack-2021-free_GM406889139.pdf
    • https://perpustakaan.stieppi.ac.id/repository/robux-for-kids_GM431946152.pdf
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdf
    • https://perpustakaan.stieppi.ac.id/repository/free-robux-youtube_GM431946152.pdf
    • https://perpustakaan.stieppi.ac.id/repository/minecraft-free-ios_GM479516143.pdf
    • https://perpustakaan.stieppi.ac.id/repository/free-robux-download_GM431946152.pdf
    • https://perpustakaan.stieppi.ac.id/repository/free-robux-codes-2021_GM431946152.pdf
    • https://perpustakaan.stieppi.ac.id/repository/who-to-get-free-robux_GM431946152.pdf
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-daily-free-spins-link_GM406889139.pdf
    • https://perpustakaan.stieppi.ac.id/repository/how-to-get-more-spins-on-coin-master_GM406889139.pdf
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-link_GM406889139.pdf
    • https://perpustakaan.stieppi.ac.id/repository/i-robux_GM431946152.pdf
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-com_GM406889139.pdf
    • https://perpustakaan.stieppi.ac.id/repository/free-spins-from-coin-master_GM406889139.pdf
    • https://perpustakaan.stieppi.ac.id/repository/free-roblox-groups_GM431946152.pdf
    • https://perpustakaan.stieppi.ac.id/repository/free-roblox-clothes-girl_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051ba.bin
7070b26ed0aa2612991b02c6b4aae2a5cf4239fceb027171d76daac313597f24		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51BA 25240 bytes
font_01_sfnt_off00008a6c.bin
465209964a09586ac5022a8b8e85d53299c19051a953d4aa9891341d9cc85b22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6C 4660 bytes
font_02_sfnt_off00009a80.bin
7ba6f7de64c6d8ae6f5469fb20d9bd46bb355649f5c0a9ce8a2cee34149577d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A80 18484 bytes

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