Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d19e7f5326183ec…

MALICIOUS

PDF

44.7 KB Created: 2021-06-07 07:04:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d4d74e92126f34a7fcc8a89f05977116 SHA-1: 7a9d3a969fb2f7ba25e452b58cc6696e95e6c67f SHA-256: 4d19e7f5326183ec73f6d179e702b0f11bc1a19a8ff1d349f1a93c38f21d20cd
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or download button to trick the user into clicking a link. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URL, https://netcdn.tw/app/431946152/roblox-supreme-hoodie-free-game-hack, likely leads to a second-stage payload or phishing site. No scripts were extracted from this sample.

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/roblox-supreme-hoodie-free-game-hack
    • http://www.sfakia-online.com/images/minecraft-free-no-download_GM479516143.pdf
    • http://www.sfakia-online.com/images/robux-redeem_GM431946152.pdf
    • http://www.sfakia-online.com/images/coin-master-free-spins-today-39_GM406889139.pdf
    • http://www.sfakia-online.com/images/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdf
    • http://www.sfakia-online.com/images/coin-master-free-spins-no-human-verification_GM406889139.pdf
    • http://www.sfakia-online.com/images/how-to-get-minecraft-realms-for-free_GM479516143.pdf
    • http://www.sfakia-online.com/images/free-spins-for-coin-master_GM406889139.pdf
    • http://www.sfakia-online.com/images/how-to-hack-into-someones-roblox-account_GM431946152.pdf
    • http://www.sfakia-online.com/images/coin-master-unlimited-spin-apk-free-download_GM406889139.pdf
    • http://www.sfakia-online.com/images/coin-master-hack-app_GM406889139.pdf
    • http://www.sfakia-online.com/images/100-free-tiktok-likes_GM835599320.pdf
    • http://www.sfakia-online.com/images/difference-between-hacking-and-exploiting-on-roblox_GM431946152.pdf
    • http://www.sfakia-online.com/images/roblox-army-free-robux_GM431946152.pdf
    • http://www.sfakia-online.com/images/free-coin-link-coin-master_GM406889139.pdf
    • http://www.sfakia-online.com/images/free-spins-coin-master-app_GM406889139.pdf
    • http://www.sfakia-online.com/images/coin-master-com_GM406889139.pdf
    • http://www.sfakia-online.com/images/minecraft-hacks-115-2_GM479516143.pdf
    • http://www.sfakia-online.com/images/minecraft-bedrock-edition-pc-download-free_GM479516143.pdf
    • http://www.sfakia-online.com/images/rich-free-roblox-accounts_GM431946152.pdf
    • http://www.sfakia-online.com/images/minecraft-windows-10-free-with-java_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051f9.bin
ac728890de806a8d42b078caf65e6a57b9b44661c133456943c82f52bed34fdc
pdf-font-stream PDF embedded font (sfnt) at offset 0x51F9 24940 bytes
font_01_sfnt_off00008aa5.bin
2cb3142abf1e524fd39a2cd21dc48992914d562820cd0f78cbd85224e68c675f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA5 18820 bytes