Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a6b3bc362b48394…

MALICIOUS

PDF

34.7 KB Created: 2021-06-18 11:32:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: af954b79a7057b3415a931ccf8ec00e6 SHA-1: d17b4d69d4bdb3b3b9c26cc5fbf081a8ac89cc8a SHA-256: 5a6b3bc362b483942b654f2e309ac9899f9acf66ae7ba20ad4e1dd9292f77991
82 Risk Score

Malware Insights

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

The document presents itself as a "Free Robux Hack" and employs a fake CAPTCHA lure to trick users into clicking malicious links. The embedded URLs, such as http://netcdn.co/app/431946152/free-robux-hack-on-pc-2021-game-hack, likely lead to further malicious content or downloads. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-robux-hack-on-pc-2021-game-hack
    • http://pesok-rk.ru/images/roblox-hack-ga_GM431946152.pdf
    • http://pesok-rk.ru/images/link-for-free-spins-on-coin-master_GM406889139.pdf
    • http://pesok-rk.ru/images/mcpe-hack-client_GM479516143.pdf
    • http://pesok-rk.ru/images/roblox-hack-server_GM431946152.pdf
    • http://pesok-rk.ru/images/get-gold-coin-master-village-hack_GM406889139.pdf
    • http://pesok-rk.ru/images/free-spins-coin-master-ios-2021_GM406889139.pdf
    • http://pesok-rk.ru/images/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdf
    • http://pesok-rk.ru/images/minecraft-mobile-free_GM479516143.pdf
    • http://pesok-rk.ru/images/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdf
    • http://pesok-rk.ru/images/how-do-u-hack-roblox_GM431946152.pdf
    • http://pesok-rk.ru/images/roblox-free-rare-accounts_GM431946152.pdf
    • http://pesok-rk.ru/images/how-to-get-followers-on-tiktok-for-free_GM835599320.pdf
    • http://pesok-rk.ru/images/roblox-texting-simulator-hack-script_GM431946152.pdf
    • http://pesok-rk.ru/images/how-to-get-minecraft-for-free-on-mac_GM479516143.pdf
    • http://pesok-rk.ru/images/links-hack-30-robux_GM431946152.pdf
    • http://pesok-rk.ru/images/how-to-get-free-minecraft-alts_GM479516143.pdf
    • http://pesok-rk.ru/images/minecraft-xray-hack_GM479516143.pdf
    • http://pesok-rk.ru/images/hack-coin-master-mod-apk_GM406889139.pdf
    • http://pesok-rk.ru/images/free-coins-coin-master-blog_GM406889139.pdf
    • http://pesok-rk.ru/images/todos-los-hacks-de-check-cashed-v3-roblox-prison-life_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003011.bin
bb3858e520cf503018389c3ed20a83293a76acbe1e0225f2008b756e6fa1a967
pdf-font-stream PDF embedded font (sfnt) at offset 0x3011 22484 bytes
font_01_sfnt_off00006205.bin
23e51d64f65d2f290aed31d8871bf6010684d8dc0952945fbd86c277af2e67ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x6205 19256 bytes