Malicious PDF — malware analysis report

Static analysis result for SHA-256 76bfbd4ad8b63bd5…

MALICIOUS

PDF

34.9 KB Created: 2021-06-27 07:12:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a954d0399a30bbac21497bc0712b8448 SHA-1: 8e3db6a6b9263389adbad2d67ced40f5e0d2eae4 SHA-256: 76bfbd4ad8b63bd5ae0ec6a5a00cca9f6e925b833085848060bda1077c820b22
82 Risk Score

Malware Insights

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

The document displays a fake CAPTCHA, a common lure to trick users into downloading and executing files. The embedded URL points to a download for a 'free mouse auto clicker' which is likely a malicious application. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/free-mouse-auto-clicker-roblox-game-hack
    • http://legs11.co.za/images/what-happens-if-you-hack-on-roblox_GM431946152.pdf
    • http://legs11.co.za/images/free-robux-apk_GM431946152.pdf
    • http://legs11.co.za/images/can-you-get-robux-for-free-from-roblox-games_GM431946152.pdf
    • http://legs11.co.za/images/minecraft-java-free-trial_GM479516143.pdf
    • http://legs11.co.za/images/free-robux-link_GM431946152.pdf
    • http://legs11.co.za/images/how-to-make-a-minecraft-server-for-free_GM479516143.pdf
    • http://legs11.co.za/images/free-robux-no-verification-2021_GM431946152.pdf
    • http://legs11.co.za/images/make-clothes-roblox-free_GM431946152.pdf
    • http://legs11.co.za/images/robux-hack-2021_GM431946152.pdf
    • http://legs11.co.za/images/free-sword-pack-roblox_GM431946152.pdf
    • http://legs11.co.za/images/roblox-free-robux-promo-codes-2021_GM431946152.pdf
    • http://legs11.co.za/images/how-to-get-free-robux-2021-feb-eazy_GM431946152.pdf
    • http://legs11.co.za/images/100-free-spins-coin-master-link_GM406889139.pdf
    • http://legs11.co.za/images/how-to-hack-in-survival-303-roblox_GM431946152.pdf
    • http://legs11.co.za/images/how-to-hack-a-roblox-account-june-2021_GM431946152.pdf
    • http://legs11.co.za/images/how-to-get-free-robux-in-ios-ipad_GM431946152.pdf
    • http://legs11.co.za/images/unlimited-robux-2021_GM431946152.pdf
    • http://legs11.co.za/images/coin-master-free-spins-daily_GM406889139.pdf
    • http://legs11.co.za/images/coin-master-free_GM406889139.pdf
    • http://legs11.co.za/images/roblox-cheats-com_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031e1.bin
deba2ff525dd0f1f1720fd4120e70778fa730c29042e1b9305108156e49f7fc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31E1 22056 bytes
font_01_sfnt_off000062ac.bin
148c153fe9919ad3ed735b4dd7bc5ed37a53ebe69b62230931eb62093190411f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62AC 19380 bytes

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