Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf31da8f03ad3e5…

MALICIOUS

PDF

44.3 KB Created: 2021-06-09 10:31:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9ded497ebcc6c6d0570018b76699f682 SHA-1: 58d727446c9398cb04ce4b33e3bee94b58837d61 SHA-256: 0cf31da8f03ad3e568a69e540d006f765a842d3c1e1f4f47e1c1899e7de04996
82 Risk Score

Malware Insights

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

The PDF document displays a fake CAPTCHA and a download button lure, aiming to trick the user into downloading a malicious file. The embedded URL points to a site offering a 'roblox-666-hack-download-game-hack', reinforcing the lure. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-666-hack-download-game-hack
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hack-for-ios_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/rbx-place-free-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-links-for-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/is-minecraft-java-edition-free_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-roblox-cards-not-used-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hacks-for-gold-cards_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-coins-coin-master-link_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hacker-club_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hack-ios-10_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/best-hacked-client_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-no-human-verification-or-survey_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-tricks-and-hacks_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/robux-generator-no-survey_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hack-cheat-generator-d_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-dominus-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/minecraft-dungeons-download-free_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-com-free-robux_GM431946152.pdf
    • https://Buy.HoaxMC.com
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050fb.bin
d203f1a88adc18e76a064f23d1ab4cf76bd83a1bf519e880fc41e7d205e3d71e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50FB 24712 bytes
font_01_sfnt_off00008889.bin
70771e0e3054388f21fe66c029c257b357082b42cdd882105becc8c9a571779c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8889 18856 bytes

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