Malicious PDF — malware analysis report

Static analysis result for SHA-256 967380b8001c5213…

MALICIOUS

PDF

45.5 KB Created: 2021-05-13 10:03:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 219e5b4ff087cc2a18a13733f2c5774f SHA-1: d1e9c664407ce48ad77d30a677f163a5057fcabc SHA-256: 967380b8001c521394dc818542a32ad82104443bd9d051e2fe5caca57cc7e57d
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with malicious content. It also embeds external URIs, including one pointing to a potentially malicious executable or script. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/rbxdemon-game-hack
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/robux-earning-sites_GM431946152.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/free-modded-minecraft-server-hosting_GM479516143.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/coin-master-game-free-play-online_GM406889139.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-to-download-minecraft-for-free-ios_GM479516143.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-to-get-free-robux-generator_GM431946152.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/free-robux-gift-card_GM431946152.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/free-account-roblox-with-robux_GM431946152.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-to-get-free-robux-on-android_GM431946152.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/free-roblox-hack-us_GM431946152.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/coin-master-free-spins-hack_GM406889139.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/free-google-play-promo-codes-coin-master_GM406889139.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/free-robux-no-scam_GM431946152.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/minecraft-free-minecraft_GM479516143.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/coin-master-hack-apk-35-8_GM406889139.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/microsoft-bing-free-robux_GM431946152.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/coin-master-free-spins-link-cheat_GM406889139.pdf
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-to-hack-roblox-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a68.bin
fd5053652106f2691347aa9facff5e51ed9af6ffb22920eb326a837e2a3e0ebe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A68 25376 bytes
font_01_sfnt_off000085af.bin
eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85AF 2940 bytes
font_02_sfnt_off00008fbe.bin
84e994ea3e0766e4b6b44f1efc08852f1b1b6721f581ba32b946cb803bfb180d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FBE 18144 bytes

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