Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e8caedaf07ed80a…

MALICIOUS

PDF

33.5 KB Created: 2021-06-20 01:04:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a19b74c3fa8fe4bc796033064904b1ae SHA-1: 2bf6134c6e9fc21204ece7ac9d847bc1498df7c7 SHA-256: 4e8caedaf07ed80a94bda0d73966d9ce83f421ab7606700544e157d987b9e1c9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which are generated SEO-style links pointing to game-related cheats and hacks. The document body explicitly mentions 'Free Robux Wallpaper' and contains a call-to-action phrase 'CLICK HERE TO ACCESS ROBUX GENERATOR'. This indicates a phishing or scam attempt designed to lure users to malicious sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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-wallpaper-game-hack
    • https://lesegais.ru/images/how-to-hack-roblox-accounts-passwords_GM431946152.pdf
    • https://lesegais.ru/images/coin-master-game-hack_GM406889139.pdf
    • https://lesegais.ru/images/how-to-make-roblox-clothes-for-free_GM431946152.pdf
    • https://lesegais.ru/images/gold-card-coin-master-free_GM406889139.pdf
    • https://lesegais.ru/images/roblox-high-school-2-cheat_GM431946152.pdf
    • https://lesegais.ru/images/roblox-free-play-no-install_GM431946152.pdf
    • https://lesegais.ru/images/how-to-build-hacks-in-roblox_GM431946152.pdf
    • https://lesegais.ru/images/coin-master-free-raid-link_GM406889139.pdf
    • https://lesegais.ru/images/free-spins-and-coins-from-coin-master-game_GM406889139.pdf
    • https://lesegais.ru/images/free-coin-master-credit_GM406889139.pdf
    • https://lesegais.ru/images/free-appsfor-coin-master-daily-rewards_GM406889139.pdf
    • https://lesegais.ru/images/play-roblox-free-online_GM431946152.pdf
    • https://lesegais.ru/images/hack-de-roblox-robux-infinito_GM431946152.pdf
    • https://lesegais.ru/images/roblox-2021-hack_GM431946152.pdf
    • https://lesegais.ru/images/free-tiktok-likes-app_GM835599320.pdf
    • https://lesegais.ru/images/coin-master-cheat-codes_GM406889139.pdf
    • https://lesegais.ru/images/is-roblox-free-on-xbox_GM431946152.pdf
    • https://lesegais.ru/images/how-do-you-hack-minecraft_GM479516143.pdf
    • https://lesegais.ru/images/how-to-get-free-robux-website_GM431946152.pdf
    • https://lesegais.ru/images/simple-ways-to-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002caa.bin
f8f88e3e82058b547f431411e66ce6635d5ba7a042c3e058b8fb46c373fef708
pdf-font-stream PDF embedded font (sfnt) at offset 0x2CAA 21932 bytes
font_01_sfnt_off00005d2e.bin
0057bd1572d36b1899630c8f3fcba4138aeb65ee90c822fb205de00485301f2e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2E 19164 bytes