Malicious PDF — malware analysis report

Static analysis result for SHA-256 243d4027a6d357b1…

MALICIOUS

PDF

52.1 KB Created: 2021-06-03 05:07:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ed267bbcdd0ecd28ce11dde68cbadc46 SHA-1: 09ba39ee26afa602ec079b6146b0005f1de35c7e SHA-256: 243d4027a6d357b1dc9a3693927ec845caf4d03fc0bca442b61537afa95a4b29
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick the user into interacting with a malicious link. The embedded URL, https://netcdn.online/app/431946152/free-roblox-hack-game-hack, likely leads to a second-stage payload download. Numerous other URLs pointing to game-related hacks and cheats were also extracted, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

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.online/app/431946152/free-roblox-hack-game-hack
    • https://loba.com.vn/public/upload/files/microsoft-bing-free-robux_GM431946152.pdf
    • https://loba.com.vn/public/upload/files/coin-master-hack-2021-apk_GM406889139.pdf
    • https://loba.com.vn/public/upload/files/roblox-hack-com_GM431946152.pdf
    • https://loba.com.vn/public/upload/files/roblox-hack-unlimited-robux_GM431946152.pdf
    • https://loba.com.vn/public/upload/files/coin-master-free-spain_GM406889139.pdf
    • https://loba.com.vn/public/upload/files/free-roblox-templates_GM431946152.pdf
    • https://loba.com.vn/public/upload/files/roblox-free-robux-generator_GM431946152.pdf
    • https://loba.com.vn/public/upload/files/buy-tiktok-followers-free_GM835599320.pdf
    • https://loba.com.vn/public/upload/files/free-tiktok-likes-app_GM835599320.pdf
    • https://loba.com.vn/public/upload/files/how-to-get-free-minecraft-alts_GM479516143.pdf
    • https://loba.com.vn/public/upload/files/free-coin-master-spins-and-coins-for-daily_GM406889139.pdf
    • https://loba.com.vn/public/upload/files/coin-master-free-spin-and-coins-links_GM406889139.pdf
    • https://loba.com.vn/public/upload/files/free-minecraft-severs_GM479516143.pdf
    • https://loba.com.vn/public/upload/files/coin-master-cheats-and-hacks_GM406889139.pdf
    • https://loba.com.vn/public/upload/files/free-robux-hack-generator_GM431946152.pdf
    • https://loba.com.vn/public/upload/files/how-to-get-free-robux-on-computer_GM431946152.pdf
    • https://loba.com.vn/public/upload/files/haktuts-coin-master-free-spins_GM406889139.pdf
    • https://loba.com.vn/public/upload/files/coinmaster-com_GM406889139.pdf
    • https://loba.com.vn/public/upload/files/google-coin-master-free-spins_GM406889139.pdf
    • https://loba.com.vn/public/upload/files/roblox-shirt-template-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005070.bin
9d6ab21715e8dc0a022c029cd25ab3ac5b8a6bb164a95d4a2cc2941ff511ae1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5070 27932 bytes
font_01_sfnt_off00008f4f.bin
f6b9a386ee4e0aff622a98b2230905da71eab0ca98398cb52018fda3528d3e2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F4F 3964 bytes
font_02_sfnt_off00009cac.bin
e59bc53cd4c0ee65dc1533becad2866f345dcb060e6c68bb8187d21cb9f973ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CAC 3396 bytes
font_03_sfnt_off0000a89e.bin
9d921b2eee93f33e2efc5c53c848117e08d630d06cf868d7193b51dd4894dd93
pdf-font-stream PDF embedded font (sfnt) at offset 0xA89E 18344 bytes