Malicious PDF — malware analysis report

Static analysis result for SHA-256 597de8f2bb5f8601…

MALICIOUS

PDF

34.2 KB Created: 2021-06-19 13:04:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cc1369e594fbdf67abf7ab904c31e885 SHA-1: 7ae7ea4bb524485838f33d2f4d4b8df9e50375ea SHA-256: 597de8f2bb5f860169c2db2a38c62bab2d945936688e206691657a1c5212c14e
82 Risk Score

Malware Insights

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

This PDF document displays a fake CAPTCHA or human verification prompt to trick users into clicking a link, likely to download a second-stage payload. The document body contains multiple URLs, with the primary one being http://netcdn.co/app/431946152/free-unlimited-robux-no-hack-or-servay-game-hack. The ML classifier also flagged this PDF as malicious with high confidence.

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-unlimited-robux-no-hack-or-servay-game-hack
    • http://katalog.iain-padangsidimpuan.ac.id/repository/escape-the-free-robux-scams-freecookie20214_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/get-free-robux-codes-2021_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/robux-free-ohne-telefonnummer_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/the-best-free-roblox-shirt_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/coin-master-free-spin-and-coin-links_GM406889139.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/how-to-get-free-roebucks-without-verification_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/minecraft-client-download_GM479516143.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/free-robux-kid-friendly_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/how-to-get-free-robux-no-hack-2021_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/free-spin-link_GM406889139.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/free-coin-coin-master_GM406889139.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/how-do-u-get-free-robux-on-iphone_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/roblox-download-free-computer_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/yt-roblox-parkour-you-can-free-runing-the-buy_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/hacker-contaiment-roblox_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/how-to-hack-coin-master-apple_GM406889139.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/how-to-hack-peoples-account-on-roblox-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f3a.bin
71fccac9eb87993cb4ed2a8c5120eac953efba61acdba7460769fc004de7b576		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F3A 21516 bytes
font_01_sfnt_off00005e19.bin
169e6f180ed45313d505e115c5cbb3fdf3217afc80572c0f98f67fad96f08e44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E19 19912 bytes

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