Malicious PDF — malware analysis report

Static analysis result for SHA-256 2abf6c768d7284d1…

MALICIOUS

PDF

45.7 KB Created: 2021-05-15 16:02:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a629048b68c1e3443ded147afc512f07 SHA-1: 797f0f47abf453c73cb9d6d70c956db88fba6e49 SHA-256: 2abf6c768d7284d14af68d1867844ebfc9c4a8b2e63c7992777f2ecbdddab792
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, aiming to trick users into clicking a link. The embedded URL, https://netcdn.xyz/app/431946152/roblox-promo-code-to-get-free-robux-game-hack, likely leads to a malicious download or further phishing attempt. The document's content and heuristics strongly suggest a social engineering attack to compromise the user.

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 https://netcdn.xyz/app/431946152/roblox-promo-code-to-get-free-robux-game-hack
    • http://www.eucorro.com/arquivos/files/coin-master-free-box_GM406889139.pdf
    • http://www.eucorro.com/arquivos/files/collect-free-spin-linms-coin-master_GM406889139.pdf
    • http://www.eucorro.com/arquivos/files/rbx-free-robux_GM431946152.pdf
    • http://www.eucorro.com/arquivos/files/daily-coin-master-free-spins_GM406889139.pdf
    • http://www.eucorro.com/arquivos/files/free-roblox-avatar_GM431946152.pdf
    • http://www.eucorro.com/arquivos/files/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdf
    • http://www.eucorro.com/arquivos/files/roblox-script-hack_GM431946152.pdf
    • http://www.eucorro.com/arquivos/files/minecraft-free-online-unblocked_GM479516143.pdf
    • http://www.eucorro.com/arquivos/files/coin-master-free-spins-and-coins-daily_GM406889139.pdf
    • http://www.eucorro.com/arquivos/files/free-foxy-food-coin-master_GM406889139.pdf
    • http://www.eucorro.com/arquivos/files/how-to-get-a-free-minecraft-server_GM479516143.pdf
    • http://www.eucorro.com/arquivos/files/how-to-get-minecraft-for-free-ios_GM479516143.pdf
    • http://www.eucorro.com/arquivos/files/free-robux-com-no-verification_GM431946152.pdf
    • http://www.eucorro.com/arquivos/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdf
    • http://www.eucorro.com/arquivos/files/minecraft-free-download-laptop_GM479516143.pdf
    • http://www.eucorro.com/arquivos/files/free-spins-generated-from-coin-master_GM406889139.pdf
    • http://www.eucorro.com/arquivos/files/can-you-earn-robux_GM431946152.pdf
    • http://www.eucorro.com/arquivos/files/coin-master-hack-no-verification_GM406889139.pdf
    • http://www.eucorro.com/arquivos/files/coinmaster-rewards_GM406889139.pdf
    • http://www.eucorro.com/arquivos/files/free-spins-and-coins-coin-master-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004943.bin
e2171f8f421f3098826ef3a158fa8238fc760dd9702817d137229f967d5685df		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4943 29704 bytes
font_01_sfnt_off00008f16.bin
57e6eef1fbc3af66d8c5b48d94799429ebee4b6256a60c8d2844d61f1a05fc0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F16 18780 bytes

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