Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca29f1286ece3cc7…

MALICIOUS

PDF

45.2 KB Created: 2021-05-17 16:02:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: bbcc1e542b1b97a157cca5b5c561281b SHA-1: 25c871663652edd12b5dbe12f021fdd17166bc21 SHA-256: ca29f1286ece3cc76da715033448fef5680cc3f3eb9dbdee89501048efa4deed
182 Risk Score

Malware Insights

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

The PDF document presents a fake CAPTCHA and instructions to paste commands into a shell, a common lure to trick users into executing malicious code. The embedded URL and numerous other URLs suggest the document is designed to lead users to download or interact with further malicious content, likely a second-stage payload. No scripts were extracted, but the heuristics strongly indicate a command execution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • Fake CAPTCHA with command-running instructions critical SE_FAKE_CAPTCHA_CLICKFIX
    Document combines fake CAPTCHA or human-verification language with instructions to paste or run a command — a high-confidence ClickFix pattern
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/i-want-free-robux-game-hack PDF link annotation
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/free-spin-link-for-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/coin-master-32-android-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/robux-game-com_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e60.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E60 27632 bytes
SHA-256: 275decadd7d911e35eea370528b4e4964401cb77c744597f307ec24430a947d1
font_01_sfnt_off00008d80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D80 18544 bytes
SHA-256: 21c84a9f4ed3b5496a815e3404d7d5cd07faeb2ee17584cb0226aa903f450845

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