Malicious PDF — malware analysis report

Static analysis result for SHA-256 7451a3d4de51d7e4…

MALICIOUS

PDF

36.7 KB Created: 2021-05-20 13:01:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 58fc7ebfd6dc7e7d0b2ef93b7aaef3a5 SHA-1: c94534f609fa192ee69248c67683fca0970a24e5 SHA-256: 7451a3d4de51d7e4d4197c1ec69844412a38af7bd3a8c030fc7b2e58b460da4f
122 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA and a visual download button lure, aiming to trick the user into clicking a link. The embedded URL and document body text point to a website offering 'free likes on TikTok' and other game hacks, which is a common social engineering tactic to deliver malware or lead to phishing sites. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6982

Heuristics 5

  • 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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/835599320/get-free-likes-on-tiktok-game-hack PDF link annotation
    • http://mohacad.com/images/chisel-and-bits-mod-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://mohacad.com/images/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/coun-master_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003060.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3060 23800 bytes
SHA-256: 7c4397c49ab892fa6d17ed68e34d13e0fd558effd26261da879ba1f0d113cd65
font_01_sfnt_off00006675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6675 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off0000705b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x705B 17456 bytes
SHA-256: 782ce757928ab8849be8d7d6232199a595fd3f8ee03de5cb15c7b9ee803e6cfd

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