Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a349227e4b73f3f…

MALICIOUS

PDF

33.4 KB Created: 2021-07-23 02:20:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 697f164a4cdb4a9ae574540f4e250de6 SHA-1: 22cc5200a0a30c5dd6bed2d7d8aa7a7d90d22c76 SHA-256: 5a349227e4b73f3f2e5f1463f4de3b4b442dc511e09fbf2685a7f5b4108247d1
82 Risk Score

Malware Insights

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

The document presents itself as a fake CAPTCHA or download lure, directing the user to click on a malicious URL. The embedded URL `http://netcdn.tw/app/431946152/how-do-you-hack-roblox-game-hack` is suspicious and likely serves as a lure for further malicious activity. While no scripts were explicitly extracted, the PDF structure and heuristics indicate an attempt to exploit user interaction for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.tw/app/431946152/how-do-you-hack-roblox-game-hack
    • https://actualise.co.za/wp-content/uploads/fsqm-files/minecraft-free-download_GM479516143.pdf
    • https://actualise.co.za/wp-content/uploads/fsqm-files/tiktok-likes-for-free_GM835599320.pdf
    • https://actualise.co.za/wp-content/uploads/fsqm-files/coin-master-daily-free-spins-and-coins_GM406889139.pdf
    • https://actualise.co.za/wp-content/uploads/fsqm-files/buy-robux-free_GM431946152.pdf
    • https://actualise.co.za/wp-content/uploads/fsqm-files/free-robux-working_GM431946152.pdf
    • https://actualise.co.za/wp-content/uploads/fsqm-files/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdf
    • https://actualise.co.za/wp-content/uploads/fsqm-files/how-to-get-minecraft-windows-10-for-free_GM479516143.pdf
    • https://actualise.co.za/wp-content/uploads/fsqm-files/minecraft-free-download-windows-10_GM479516143.pdf
    • https://actualise.co.za/wp-content/uploads/fsqm-files/free-robux-codes_GM431946152.pdf
    • https://actualise.co.za/wp-content/uploads/fsqm-files/free-minecraft-accounts-2021_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002afa.bin
0ef0809cacc81f55647d1d662e0da253ee355557319071c4e0529c1e54e53dde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AFA 22944 bytes
font_01_sfnt_off00005e51.bin
4b71adf96b398875430a9907a488e359cbeb672bde5d827a1821c0316b66e933		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E51 19000 bytes

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