Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1e632240b3b8c48…

MALICIOUS

PDF

43.6 KB Created: 2021-05-17 06:07:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 889aaf7e1d4c3c9c79a862bdb939bca5 SHA-1: 53b6634ee103e417a3d44088935e254c04ad614b SHA-256: d1e632240b3b8c484ff1ab33fe16df9f590ed40f3b9e5b9683078a216157b72f
82 Risk Score

Malware Insights

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

The PDF document contains a lure for free Robux, presenting a fake CAPTCHA to trick users into clicking a malicious link. The embedded URL and numerous other URLs point to sites offering game-related cheats or hacks, suggesting a social engineering campaign. While no scripts were directly extracted, the PDF's structure and heuristic firings indicate it's designed to lead the user to a malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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/how-to-get-free-robux-without-human-verification-2021-game-hack
    • http://tdfsinfronteras.com/images/instagram-free-coin-master-spins_GM406889139.pdf
    • http://tdfsinfronteras.com/images/coin-master-facebook_GM406889139.pdf
    • http://tdfsinfronteras.com/images/haktuts-coin-master-free-spin-link_GM406889139.pdf
    • http://tdfsinfronteras.com/images/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdf
    • http://tdfsinfronteras.com/images/free-roblox-card_GM431946152.pdf
    • http://tdfsinfronteras.com/images/coin-master-hack-online-pc_GM406889139.pdf
    • http://tdfsinfronteras.com/images/what-is-robux-in-roblox_GM431946152.pdf
    • http://tdfsinfronteras.com/images/minecraft-hack-client-18-9_GM479516143.pdf
    • http://tdfsinfronteras.com/images/hack-a-game_GM431946152.pdf
    • http://tdfsinfronteras.com/images/robux-hack-me_GM431946152.pdf
    • http://tdfsinfronteras.com/images/where-to-get-free-robux_GM431946152.pdf
    • http://tdfsinfronteras.com/images/rewardrobux-com_GM431946152.pdf
    • http://tdfsinfronteras.com/images/coin-master-free-spins-gratis_GM406889139.pdf
    • http://tdfsinfronteras.com/images/free-coin-master-gift-link_GM406889139.pdf
    • http://tdfsinfronteras.com/images/fb-coin-master-free-spins-link_GM406889139.pdf
    • http://tdfsinfronteras.com/images/free-spins-on-coin-master-cheat_GM406889139.pdf
    • http://tdfsinfronteras.com/images/roblox-lawsuit_GM431946152.pdf
    • http://tdfsinfronteras.com/images/haktuts-coin-master-free-daily-spins_GM406889139.pdf
    • http://tdfsinfronteras.com/images/free-spins-for-coin-master-2021_GM406889139.pdf
    • http://tdfsinfronteras.com/images/roblox-hair-for-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049ff.bin
e7b67f80b34b71b96018bc409491245230f6334091c81ebd159cc791b358456f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49FF 24944 bytes
font_01_sfnt_off00008380.bin
2fcc096d095577e17bc813bca386b7e419c64e6aba5a370ab2124621dd0af6c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8380 19792 bytes

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