Malicious PDF — malware analysis report

Static analysis result for SHA-256 11413fb4106da31b…

MALICIOUS

PDF

42.8 KB Created: 2021-05-19 22:30:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3db6f5052b7fdb040586a58d508bbc41 SHA-1: 9cd8bc7d643d3e7c9c99b8faf2e828c35d25e661 SHA-256: 11413fb4106da31b38d59b936126790662eec7a7861c7dfd630f801fc305f188
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick the user into clicking a malicious link. The embedded URL, https://netcdn.xyz/app/406889139/coin-master-free-2021-spin-link-today-game-hack, likely leads to a scam or a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-free-2021-spin-link-today-game-hack PDF link annotation
    • https://abouttimetech.com/images/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://abouttimetech.com/images/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • https://abouttimetech.com/images/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • https://abouttimetech.com/images/robux-only_GM431946152.pdfIn PDF document text
    • https://abouttimetech.com/images/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • https://abouttimetech.com/images/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • https://abouttimetech.com/images/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://abouttimetech.com/images/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • https://abouttimetech.com/images/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://abouttimetech.com/images/hack-coin-master-xyz_GM406889139.pdfIn PDF document text
    • https://abouttimetech.com/images/www-free-robux-com_GM431946152.pdfIn PDF document text
    • https://abouttimetech.com/images/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://abouttimetech.com/images/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • https://abouttimetech.com/images/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://abouttimetech.com/images/hack-a-game_GM431946152.pdfIn PDF document text
    • https://abouttimetech.com/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://abouttimetech.com/images/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://abouttimetech.com/images/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • https://abouttimetech.com/images/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • https://abouttimetech.com/images/roblox-free-robux-codes_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
stream_003_off000048ca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48CA 25136 bytes
SHA-256: e1af0729dc2580c5af5ebe2b062493e5fbeb4186f374c47aa7925f4cf824da78
font_01_sfnt_off00008339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8339 18812 bytes
SHA-256: 7f624a4da072bd42e21ae13ab081f80009d2c012a41e181bc6a40f65c236f9bb

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