Malicious PDF — malware analysis report

Static analysis result for SHA-256 50721276a6539342…

MALICIOUS

PDF

35.0 KB Created: 2021-06-26 19:28:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3c8bd4cab473daa18655bb102788bbe8 SHA-1: be99615f7f535124998b8d574d7a4f936572268f SHA-256: 50721276a65393428971dad07c4a7508828740314fbf0872b38f95e77ead7b91
82 Risk Score

Malware Insights

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

The document contains numerous URLs disguised as download links for game cheats and in-game currency, aiming to trick users into downloading malicious files. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a 'download button' heuristic further supports a malicious intent. The document body text directly references game hacks and downloads, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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 http://netcdn.co/app/431946152/roblox-grand-blox-auto-2-all-cmds-hack-game-hack
    • https://www.wannon.tw/upload/files/roblox-free-items-2021_GM431946152.pdf
    • https://www.wannon.tw/upload/files/minecraft-for-chromebook-free_GM479516143.pdf
    • https://www.wannon.tw/upload/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdf
    • https://www.wannon.tw/upload/files/the-community-hacker-roblox_GM431946152.pdf
    • https://www.wannon.tw/upload/files/how-to-get-free-robux-by-playing-games_GM431946152.pdf
    • https://www.wannon.tw/upload/files/inject-hack-roblox-robux_GM431946152.pdf
    • https://www.wannon.tw/upload/files/coin-master-free-spins-2021_GM406889139.pdf
    • https://www.wannon.tw/upload/files/coin-master-hacks-free-spins_GM406889139.pdf
    • https://www.wannon.tw/upload/files/games-for-robux_GM431946152.pdf
    • https://www.wannon.tw/upload/files/free-2021-robux_GM431946152.pdf
    • https://www.wannon.tw/upload/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdf
    • https://www.wannon.tw/upload/files/coins-master-hack_GM406889139.pdf
    • https://www.wannon.tw/upload/files/how-to-get-free-spins-coin-master_GM406889139.pdf
    • https://www.wannon.tw/upload/files/free-roblox-bundles_GM431946152.pdf
    • https://www.wannon.tw/upload/files/free-robux-without-offers_GM431946152.pdf
    • https://www.wannon.tw/upload/files/notoriety-roblox-shadow-raid-secret-cheat_GM431946152.pdf
    • https://www.wannon.tw/upload/files/what-are-points-for-in-roblox_GM431946152.pdf
    • https://www.wannon.tw/upload/files/free-coin-master-coins_GM406889139.pdf
    • https://www.wannon.tw/upload/files/coin-master-hack-without-verification-2021_GM406889139.pdf
    • https://www.wannon.tw/upload/files/this-roblox-shirt-gives-free-domimnus_GM431946152.pdf
    • http://netcdn.co/app/431946152/roblox-gr
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003056.bin
c197143f8e3fc362fd1e7a92793a4f60d37343eaa06ffe55e33aaf49a9489605
pdf-font-stream PDF embedded font (sfnt) at offset 0x3056 22488 bytes
font_01_sfnt_off00006273.bin
a746dd211347f38491d1015da95b37fc66704f85b6e5921991b114f6b2f705a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6273 19456 bytes