Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a5979fd73f5c0bc…

MALICIOUS

PDF

46.0 KB Created: 2021-06-10 22:13:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 26e759c98a97c8fe10580e7535eb9b83 SHA-1: a1550a4735cd744abc37ba077a78908a15a16628 SHA-256: 6a5979fd73f5c0bc3ab1d0d47d8f40379450af87e90c8c8776229f1a538e75ce
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents a fake CAPTCHA and a call-to-action to trick users into clicking a link for a 'Free Robux Hack'. This link, along with numerous others found in the document, likely leads to a malicious download or exploit. The ML classifier also flagged this PDF as malicious with high confidence.

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/free-robux-hack-instantly-game-hack
    • http://psb.sd-alazhar29.sch.id/repository/minecraft-pe_GM479516143.pdf
    • http://psb.sd-alazhar29.sch.id/repository/play-minecraft-free-online-no-download_GM479516143.pdf
    • http://psb.sd-alazhar29.sch.id/repository/can-you-give-me-free-robux_GM431946152.pdf
    • http://psb.sd-alazhar29.sch.id/repository/how-to-get-free-gamepasses-on-roblox_GM431946152.pdf
    • http://psb.sd-alazhar29.sch.id/repository/how-to-hack-and-get-free-robux_GM431946152.pdf
    • http://psb.sd-alazhar29.sch.id/repository/robux-fun-hack_GM431946152.pdf
    • http://psb.sd-alazhar29.sch.id/repository/watch-videos-for-robux_GM431946152.pdf
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-hack-dot-xyz_GM406889139.pdf
    • http://psb.sd-alazhar29.sch.id/repository/wurst-download_GM479516143.pdf
    • http://psb.sd-alazhar29.sch.id/repository/free-links-coin-master_GM406889139.pdf
    • http://psb.sd-alazhar29.sch.id/repository/haktuts-free-spins_GM406889139.pdf
    • http://psb.sd-alazhar29.sch.id/repository/is-free-robux-real_GM431946152.pdf
    • http://psb.sd-alazhar29.sch.id/repository/robux-hack-no-human-verification_GM431946152.pdf
    • http://psb.sd-alazhar29.sch.id/repository/cheats-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-hacks-for-free-spins_GM406889139.pdf
    • http://psb.sd-alazhar29.sch.id/repository/free-compagnon-roblox_GM431946152.pdf
    • http://psb.sd-alazhar29.sch.id/repository/coinmasterfreespinlink_GM406889139.pdf
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-fan-page_GM406889139.pdf
    • http://psb.sd-alazhar29.sch.id/repository/roblox-vip-hack-cheat-engine_GM431946152.pdf
    • http://psb.sd-alazhar29.sch.id/repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052ba.bin
e5035ce8c36b10eb6edb8a55801bd2c352851397c01e279a72bc21e33736d61b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52BA 26580 bytes
font_01_sfnt_off00008fe6.bin
c83a75282d11a2f5af74a8ad9f5b899fd79d9c032f6ea5bf451045606329a16f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE6 18772 bytes

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