Malicious PDF — malware analysis report

Static analysis result for SHA-256 123c29f04e30f47e…

MALICIOUS

PDF

48.4 KB Created: 2021-06-09 17:43:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ca6f290736e1c9140261bbe495500184 SHA-1: 4edb8e0cbc9ba183039202c2799e4e00c32ffeff SHA-256: 123c29f04e30f47e2458449eaaab0ff5c2c157017e828aeda3943865e17b0a92
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure, designed to trick users into clicking on numerous external links. These links, such as 'https://netcdn.tw/app/431946152/kazoks-roblox-hack-game-hack', likely lead to malicious content or scams. The presence of a large number of SEO-optimized PDF links further suggests a link farm intended for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/kazoks-roblox-hack-game-hack
    • http://www.businessgalaxy.lk/files/files/how-to-hack-someones-roblox-account_GM431946152.pdf
    • http://www.businessgalaxy.lk/files/files/coin-master-free-coins-app_GM406889139.pdf
    • http://www.businessgalaxy.lk/files/files/xray-mod-minecraft-114_GM479516143.pdf
    • http://www.businessgalaxy.lk/files/files/microsoft-free-robux_GM431946152.pdf
    • http://www.businessgalaxy.lk/files/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdf
    • http://www.businessgalaxy.lk/files/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdf
    • http://www.businessgalaxy.lk/files/files/coin-master-free-coins-and-spins-hack_GM406889139.pdf
    • http://www.businessgalaxy.lk/files/files/roblox-apk-hack_GM431946152.pdf
    • http://www.businessgalaxy.lk/files/files/coin-master-fb-free-spins-link_GM406889139.pdf
    • http://www.businessgalaxy.lk/files/files/hack-coin-master-apk-ios_GM406889139.pdf
    • http://www.businessgalaxy.lk/files/files/how-to-get-followers-on-tiktok-for-free_GM835599320.pdf
    • http://www.businessgalaxy.lk/files/files/coin-master-daily-free-spins-link_GM406889139.pdf
    • http://www.businessgalaxy.lk/files/files/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdf
    • http://www.businessgalaxy.lk/files/files/coin-master-free-spin-now_GM406889139.pdf
    • http://www.businessgalaxy.lk/files/files/minecraft-hacks-list_GM479516143.pdf
    • http://www.businessgalaxy.lk/files/files/how-to-get-hacks-on-minecraft_GM479516143.pdf
    • http://www.businessgalaxy.lk/files/files/free-spins-coin-master-march-2021_GM406889139.pdf
    • http://www.businessgalaxy.lk/files/files/free-robux-no-offers_GM431946152.pdf
    • http://www.businessgalaxy.lk/files/files/coin-master-hack-pc-free_GM406889139.pdf
    • http://www.businessgalaxy.lk/files/files/coin-master-email-rewards-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005281.bin
e0c567af784b5d2b49ba531e08008bdfb9115be27d49fda3a4b63aa16c2d0c33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5281 25608 bytes
font_01_sfnt_off00008d3f.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D3F 5696 bytes
font_02_sfnt_off00009a51.bin
a06e1838da95cc41553693d0dcf4bc1d11046c7072ef4efe47ec720dce8fd357		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A51 18264 bytes

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