Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6ca7903240992df…

MALICIOUS

PDF

44.6 KB Created: 2021-05-14 01:06:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f8bf53657d6c2a02452a3220e305853c SHA-1: a434e821fe7769df0e7ac5ea5d0f7f13a0d55102 SHA-256: f6ca7903240992df97b8a8b838dcf30c94fc4e2d51d67c960c170c3dd7e3123e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains a fake CAPTCHA lure, designed to trick the user into interacting with the document. It also contains numerous embedded URLs, one of which, https://netcdn.xyz/app/431946152/roblox-hack-ga-game-hack, is likely the download location for a malicious payload. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/roblox-hack-ga-game-hack
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/free-promo-codes-for-robux_GM431946152.pdf
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/cute-free-roblox-clothes_GM431946152.pdf
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/coin-master-free-download_GM406889139.pdf
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/roblox-robux_GM431946152.pdf
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/coin-master-free-stuff_GM406889139.pdf
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/free-robux-ad_GM431946152.pdf
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/free-spin-coin-master-2021-link_GM406889139.pdf
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/games-that-can-be-hacked_GM431946152.pdf
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/blogspot-free-spins-coin-master_GM406889139.pdf
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdf
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/free-robux-apps-that-work_GM431946152.pdf
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/collect-free-spins-for-coin-master_GM406889139.pdf
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/how-to-get-free-unlimited-robux_GM431946152.pdf
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/coin-master-time-speed-hack_GM406889139.pdf
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/how-to-get-stuff-that-cost-coins-free-mcpe-master_GM406889139.pdf
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/100-robux_GM431946152.pdf
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/how-to-hack-any-roblox-account_GM431946152.pdf
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdf
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/hacks-for-coin-master_GM406889139.pdf
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/free-robux-that-actually-works_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b99.bin
570c9f21b2113401a37b3379830afd59fc51aa9295aa2c96becb9d26f4eb14c8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B99 28792 bytes
font_01_sfnt_off00008c75.bin
3275d650180bfb45a9fb7d5756aac43dcbbafe87c7818dab7a1b2e1f44194404		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C75 18184 bytes

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