Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9ff4807429f8d14…

MALICIOUS

PDF

34.3 KB Created: 2021-06-28 14:23:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ed07ac46dec5f8f8f7be0fea1b044468 SHA-1: 36d2ffb18d10a96f594a3827ad5003b7b3ed91b7 SHA-256: c9ff4807429f8d14cc57a21a0fcd491f569882b3e49a9132227b4f4546e37fb9
82 Risk Score

Malware Insights

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

The document presents itself as a free hacking tool for Roblox, a common lure for malicious downloads. It contains a fake CAPTCHA to trick users into proceeding with the download, which is hosted at http://netcdn.co/app/431946152/free-hacking-for-roblox-game-hack. The ML classifier strongly indicates maliciousness, and the presence of numerous related URLs further supports this assessment.

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-hacking-for-roblox-game-hack PDF link annotation
    • http://perpus.i2s-learning.com/repository/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-hack-without-human-verification-india_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-free-adidas_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/get-robux-today_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-free-gift-card-com_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-freeze-players-hack_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-hack-top-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-hacks-xray-2021_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
font_00_sfnt_off000031e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E3 21716 bytes
SHA-256: 3a8ee61e447b1b17333b0e9b5e2c94637f3afe24a797913c43da7bc05d3b059d
font_01_sfnt_off00006192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6192 18940 bytes
SHA-256: 9be1600214645540243494a3a76c22c202362893ffb97c6b18717f92e4726959

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