Malicious PDF — malware analysis report

Static analysis result for SHA-256 606ae6a9b4c83afc…

MALICIOUS

PDF

43.2 KB Created: 2021-05-17 18:31:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 06f3b3ab8ba77a2464d4c59f8d27fc31 SHA-1: bed95bb01f4bebf834f5418dcfa986d265a5d907 SHA-256: 606ae6a9b4c83afcd06ceaf9a5ec79d11d1d9a476acfc4fc93eab08a6afb09f1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document presents a fake CAPTCHA lure to trick users into interacting with malicious content, likely leading to a download or redirection. The presence of multiple URLs associated with game hacks and free currency suggests a scam or malware distribution campaign. No scripts were extracted, but the PDF structure and embedded URIs indicate a malicious intent to exploit user curiosity for financial gain or system compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/431946152/free-robux-com-2021-game-hack
    • http://deyuan-pc.com.tw/images/sb-game-hacker-coin-master_GM406889139.pdf
    • http://deyuan-pc.com.tw/images/minecraft-hacked-client_GM479516143.pdf
    • http://deyuan-pc.com.tw/images/free-spin-in-coin-master_GM406889139.pdf
    • http://deyuan-pc.com.tw/images/coin-master-free-coins--spins_GM406889139.pdf
    • http://deyuan-pc.com.tw/images/free-roblox-clothes-templates_GM431946152.pdf
    • http://deyuan-pc.com.tw/images/www-roblox-com-robux-free_GM431946152.pdf
    • http://deyuan-pc.com.tw/images/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdf
    • http://deyuan-pc.com.tw/images/bux-gg-robux-free_GM431946152.pdf
    • http://deyuan-pc.com.tw/images/robux-generator-that-works_GM431946152.pdf
    • http://deyuan-pc.com.tw/images/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • http://deyuan-pc.com.tw/images/is-roblox-studio-free_GM431946152.pdf
    • http://deyuan-pc.com.tw/images/get-free-spins-in-coin-master_GM406889139.pdf
    • http://deyuan-pc.com.tw/images/minecraft-logo-maker-free_GM479516143.pdf
    • http://deyuan-pc.com.tw/images/how-to-get-free-robux-no-verification-2021_GM431946152.pdf
    • http://deyuan-pc.com.tw/images/minecraft-multiplayer-free_GM479516143.pdf
    • http://deyuan-pc.com.tw/images/minecraft-free-version-pc_GM479516143.pdf
    • http://deyuan-pc.com.tw/images/free-robux-site_GM431946152.pdf
    • http://deyuan-pc.com.tw/images/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdf
    • http://deyuan-pc.com.tw/images/coin-master-hack-tool-exe_GM406889139.pdf
    • http://deyuan-pc.com.tw/images/coin-master-hack-2021-without-human-verification_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049f1.bin
6fc9599cff81126dbb8ef59c090058ebd833dc481c36e260a3097a4d4dfbf928		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49F1 26416 bytes
font_01_sfnt_off0000853f.bin
db7deb15448d884d15c6a42f746ab8a768d26593fd7e085f0109997e06cd96ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x853F 18676 bytes

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