Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb2e5315193f607e…

MALICIOUS

PDF

46.3 KB Created: 2021-06-02 17:30:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3e0c6cc6d0f4d7f52c64e5fbab619d6b SHA-1: d369193b979c9ba3438c8056ab3844a309a16328 SHA-256: cb2e5315193f607e2da5cbaee8b61328352d4c450b2de4ad43f497b29f94d82f
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure and a visual download button, aiming to trick the user into interacting with malicious content. It also embeds an external URI pointing to a suspicious URL, likely intended to download a second-stage payload or redirect the user to a phishing site. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/hack-de-roblox-para-tener-robux-gratis-game-hack
    • http://galletta.com/images/free-minecraft-hosting_GM479516143.pdf
    • http://galletta.com/images/free-robux-mobile_GM431946152.pdf
    • http://galletta.com/images/how-to-downgrade-minecraft-pe_GM479516143.pdf
    • http://galletta.com/images/coin-master-ultra-attack-hack_GM406889139.pdf
    • http://galletta.com/images/tiktok-free-like_GM835599320.pdf
    • http://galletta.com/images/how-to-get-100-free-spins-on-coin-master_GM406889139.pdf
    • http://galletta.com/images/roblox-free-robux-generator-apphack-online_GM431946152.pdf
    • http://galletta.com/images/free-robux-2021_GM431946152.pdf
    • http://galletta.com/images/free-coin-and-spin-for-coin-master_GM406889139.pdf
    • http://galletta.com/images/roblox-controversy_GM431946152.pdf
    • http://galletta.com/images/how-to-get-free-robux-2021_GM431946152.pdf
    • http://galletta.com/images/minecraft-free-download-chromebook_GM479516143.pdf
    • http://galletta.com/images/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdf
    • http://galletta.com/images/coin-master-hacks-no-downloading_GM406889139.pdf
    • http://galletta.com/images/www-roblox-com-robux-free_GM431946152.pdf
    • http://galletta.com/images/coin-master-free-spin-codes_GM406889139.pdf
    • http://galletta.com/images/free-coins-coin-master-blog_GM406889139.pdf
    • http://galletta.com/images/free-robux-codes-no-verification_GM431946152.pdf
    • http://galletta.com/images/robux-claimer_GM431946152.pdf
    • http://galletta.com/images/free-robux-site_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e4b.bin
f41ac2dec348fb3076003f1c255ba7ea9cb709daf1315adb1a4e8c58f9181d78		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E4B 30976 bytes
font_01_sfnt_off000090c0.bin
b43652feda976407b67569dcfe295e8dcff85142419de08cac8fed3f0a6c9e47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90C0 18868 bytes

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