Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ff10863b1ea421…

MALICIOUS

PDF

42.1 KB Created: 2021-05-19 00:12:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e8dc92eee61ce809efcc3fc8296ec337 SHA-1: 09346be0dca046a5f1b712f2e556ca71e59d567d SHA-256: f8ff10863b1ea4211b64c0d2d2dda30c1d1c124f9a5ff5c3371cf574db11d3ba
82 Risk Score

Malware Insights

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

This PDF document was flagged by an ML classifier as malicious. It presents a fake CAPTCHA to trick users into interacting with the document, likely to download a secondary payload or redirect to a malicious site. The document contains numerous embedded URLs, with the primary one being https://netcdn.xyz/app/406889139/how-to-get-free-spins-on-coin-master-2021-ios-game-hack, which is likely part of the lure.

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/how-to-get-free-spins-on-coin-master-2021-ios-game-hack PDF link annotation
    • http://cmfd.nl/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://cmfd.nl/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://cmfd.nl/images/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://cmfd.nl/images/login-robux_GM431946152.pdfIn PDF document text
    • http://cmfd.nl/images/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://cmfd.nl/images/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://cmfd.nl/images/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://cmfd.nl/images/coin-master-tiradas-gratis-link_GM406889139.pdfIn PDF document text
    • http://cmfd.nl/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://cmfd.nl/images/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • http://cmfd.nl/images/robux-offers_GM431946152.pdfIn PDF document text
    • http://cmfd.nl/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://cmfd.nl/images/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://cmfd.nl/images/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • http://cmfd.nl/images/roblox-games-free_GM431946152.pdfIn PDF document text
    • http://cmfd.nl/images/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://cmfd.nl/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://cmfd.nl/images/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://cmfd.nl/images/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://cmfd.nl/images/free-mods-for-minecraft-pe_GM479516143.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_off000048a4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A4 24904 bytes
SHA-256: 9a678ee5fe74f3abe800e74266298833413b32b7563642b4a41dcfe9f6fe31a9
font_01_sfnt_off00008197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8197 18452 bytes
SHA-256: 1a65c7fcb9bad972bd4806159ebd9204317f4feb10db53d1e42ac086b2fa499a

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