Malicious PDF — malware analysis report

Static analysis result for SHA-256 47159be4e58df574…

MALICIOUS

PDF

45.2 KB Created: 2021-06-10 21:14:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: eaa8543180bb7b13d2bbe1cfdc0bddb7 SHA-1: 21524530a61ee7e3a87e814c757e32adb12ee2d0 SHA-256: 47159be4e58df574389e09845e7373cfdc7b71e2db8a4d75393b5ba709e541cd
82 Risk Score

Malware Insights

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

The document presents itself as a 'Hack Tool Robux' and contains a fake CAPTCHA lure to trick users into downloading a payload. It embeds multiple URLs, including one pointing to 'netcdn.tw', which likely hosts the secondary malicious content. The presence of embedded URLs and the fake CAPTCHA heuristic strongly indicate a phishing or social engineering attack aimed at delivering malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/hack-tool-robux-game-hack
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/fireboat-dynamic-ship-simulator-free-roblox_GM431946152.pdf
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/get-free-spins-on-coin-master_GM406889139.pdf
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/free-robux-no-verification-or-survey-2021_GM431946152.pdf
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/how-to-setup-a-minecraft-server-for-free_GM479516143.pdf
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/100-free-spins-coin-master-link_GM406889139.pdf
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/coin-master-free-spins-hack-apk-download_GM406889139.pdf
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/how-do-i-get-robux_GM431946152.pdf
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/coin-master-spin-cheat_GM406889139.pdf
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/free-minecraft-account-generator_GM479516143.pdf
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/coin-master-free-spins-2021_GM406889139.pdf
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdf
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-verification_GM431946152.pdf
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/free-coin-master-links_GM406889139.pdf
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/free-spins-coin-master-2021-hack_GM406889139.pdf
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/download-tiktok-for-free_GM835599320.pdf
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/free-robux-codes-generator_GM431946152.pdf
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/coin-master-heaven_GM406889139.pdf
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/robux-free-co_GM431946152.pdf
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/coin-master-ultra-attack-hack_GM406889139.pdf
    • http://www.marvelorlubricants.com/uploaded_files/userfiles/files/free-robux-pins_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053ea.bin
42c7ab93f5181fb5d2db44735908638e971e7886bb5a6bf70772c15c18e83e58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53EA 25280 bytes
font_01_sfnt_off00008dc1.bin
7532ad589ae04f8b89deb1ef07751f100817b1006f1843ed7dc68e0d03dbff86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC1 18320 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.