Malicious PDF — malware analysis report

Static analysis result for SHA-256 03368a8dff111228…

MALICIOUS

PDF

55.0 KB Created: 2021-06-03 06:31:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: da7292f54574a85b277567cbe5cd1c12 SHA-1: db290327cbbbc625842831fa3816ba1cd331c475 SHA-256: 03368a8dff111228355dbfaffdba78d1413dd8180d620bd67a7212562b229dae
182 Risk Score

Malware Insights

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

This PDF document employs social engineering tactics, specifically a fake CAPTCHA, to trick users into executing commands. The heuristic 'SE_FAKE_CAPTCHA_CLICKFIX' indicates that the document instructs users to paste or run commands, likely to download and execute a second-stage payload. The embedded URL 'https://netcdn.online/app/479516143/minecraft-cheat-client-game-hack' is a primary indicator of the malicious payload's origin.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9523

Heuristics 6

  • Fake CAPTCHA with command-running instructions critical SE_FAKE_CAPTCHA_CLICKFIX
    Document combines fake CAPTCHA or human-verification language with instructions to paste or run a command — a high-confidence ClickFix pattern
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/479516143/minecraft-cheat-client-game-hack
    • http://elibrary.perludem.org//repository/how-to-get-free-robux-on-chromebook_GM431946152.pdf
    • http://elibrary.perludem.org//repository/free-robux-games-that-actually-work-2021_GM431946152.pdf
    • http://www.elibrary.perludem.org/repository/roblox-ban_GM431946152.pdf
    • http://elibrary.perludem.org/repository/free-spins-for-coin-master-ios_GM406889139.pdf
    • http://www.elibrary.perludem.org/repository/free-dump-roblox-accounts_GM431946152.pdf
    • http://elibrary.perludem.org/repository/pubg-uc-sale_GM1330123889.pdf
    • http://www.elibrary.perludem.org/repository/coin-master-stop-attack-hack_GM406889139.pdf
    • http://elibrary.perludem.org/repository/free-robux-without-verification-or-survey_GM431946152.pdf
    • http://elibrary.perludem.org//repository/www-roblox-com-free-robux_GM431946152.pdf
    • http://elibrary.perludem.org/repository/coin-master-free-spins-save_GM406889139.pdf
    • http://elibrary.perludem.org/repository/coin-master-cheat-codes_GM406889139.pdf
    • http://www.elibrary.perludem.org/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdf
    • http://www.elibrary.perludem.org/repository/roblox-g_GM431946152.pdf
    • http://www.elibrary.perludem.org/repository/free-robux-without-offers_GM431946152.pdf
    • http://elibrary.perludem.org//repository/coin-master-free-spins-link-download-today_GM406889139.pdf
    • http://elibrary.perludem.org//repository/roblox-hack-site_GM431946152.pdf
    • http://elibrary.perludem.org/repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdf
    • http://www.elibrary.perludem.org/repository/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdf
    • http://www.elibrary.perludem.org/repository/coin-master-free-chest-link_GM406889139.pdf
    • http://elibrary.perludem.org/repository/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000542b.bin
29dee68dbdc3bb18244e82ad328ca00d80dcde12cf004bbbf9ea624516333d04		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x542B 25840 bytes
font_01_sfnt_off00008e8f.bin
038829bc81e15b6024d2a75b24b2b95e916dd2d8797e4f87b867de59d61698ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E8F 7936 bytes
font_02_sfnt_off0000a7ba.bin
ab6320ab342704d2c5943abfba82ed4837bf2da871c91621741fd4cfd15c6ed5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7BA 4232 bytes
font_03_sfnt_off0000b647.bin
ae4d3a4e8db3c535571974f20d29f774c055cc29dc4a6064f071376039008cf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB647 17808 bytes

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