Malicious PDF — malware analysis report

Static analysis result for SHA-256 15ccfcb0e971e6b0…

MALICIOUS

PDF

43.0 KB Created: 2021-05-13 11:37:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8d57a5e7fb3d01a58e220af5c5a96001 SHA-1: 0deef39fa8d2fbb85199551ea0d06b281d36dda7 SHA-256: 15ccfcb0e971e6b07611865d25a571e54c06bdd04547f4c15c1fbcdf90e8cec7
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA and a lure for "free Robux" to trick the user into clicking a malicious URL. The embedded URL and numerous other URLs found within the document point to potentially malicious content or phishing sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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/get-free-robux-now-game-hack
    • http://repository.poltekkesjakarta3.ac.id/repository/coin-master-free-spin-realme-products_GM406889139.pdf
    • http://repository.poltekkesjakarta3.ac.id/repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdf
    • http://repository.poltekkesjakarta3.ac.id/repository/coin-master-link-app_GM406889139.pdf
    • http://repository.poltekkesjakarta3.ac.id/repository/coin-master-deals_GM406889139.pdf
    • http://repository.poltekkesjakarta3.ac.id/repository/roblox-free-roblox_GM431946152.pdf
    • http://repository.poltekkesjakarta3.ac.id/repository/coin-master-free-spins-daily_GM406889139.pdf
    • http://repository.poltekkesjakarta3.ac.id/repository/roblox-data-breach_GM431946152.pdf
    • http://repository.poltekkesjakarta3.ac.id/repository/roblox-promo-codes-free-robux_GM431946152.pdf
    • http://repository.poltekkesjakarta3.ac.id/repository/free-bedrock-minecraft_GM479516143.pdf
    • http://repository.poltekkesjakarta3.ac.id/repository/coin-master-hack-mod-apk-android-1_GM406889139.pdf
    • http://repository.poltekkesjakarta3.ac.id/repository/coin-master-card-hack-2021_GM406889139.pdf
    • http://repository.poltekkesjakarta3.ac.id/repository/how-to-hack-roblox-2021_GM431946152.pdf
    • http://repository.poltekkesjakarta3.ac.id/repository/robux-hack-tools_GM431946152.pdf
    • http://repository.poltekkesjakarta3.ac.id/repository/como-hackear-coin-master-2021_GM406889139.pdf
    • http://repository.poltekkesjakarta3.ac.id/repository/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdf
    • http://repository.poltekkesjakarta3.ac.id/repository/minecraft-xray-hack_GM479516143.pdf
    • http://repository.poltekkesjakarta3.ac.id/repository/roblox-free-play_GM431946152.pdf
    • http://repository.poltekkesjakarta3.ac.id/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdf
    • http://repository.poltekkesjakarta3.ac.id/repository/coin-master-hack-fast_GM406889139.pdf
    • http://repository.poltekkesjakarta3.ac.id/repository/how-to-make-clothes-on-roblox-for-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ab0.bin
cd0a25545b89ece4185b11a71113ba87d7ab622ee4137a5a12d99db712ee4be1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AB0 25340 bytes
font_01_sfnt_off000085ac.bin
538c9dd0db01d2f7ccbac1c4b1e59781ee6b2d24c7879b3cb67aab50807a8027		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85AC 18280 bytes

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