Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2dbf90f32c076b3…

MALICIOUS

PDF

46.1 KB Created: 2021-06-03 23:25:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d7293bf0def12f2ebef6b7518ccf7d63 SHA-1: dc1e221fd022fc399595ef992fb4593cdf643019 SHA-256: c2dbf90f32c076b33b97ff86f1ed93e1999b6922ecc79d436cdb0cfdd2024b07
122 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure to trick users into downloading a file from the URL https://netcdn.online/app/431946152/boku-no-roblox-remastered-cheat-codes-game-hack. The document also contains numerous other embedded URLs, likely part of the same lure campaign. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.online/app/431946152/boku-no-roblox-remastered-cheat-codes-game-hack
    • http://www.library.gkigadingserpong.org/repository/cm-daily-spins_GM406889139.pdf
    • http://www.library.gkigadingserpong.org/repository/how-to-hack-roblox-passwords_GM431946152.pdf
    • http://www.library.gkigadingserpong.org/repository/roblox-robux_GM431946152.pdf
    • http://www.library.gkigadingserpong.org/repository/cute-free-roblox-clothes_GM431946152.pdf
    • http://library.gkigadingserpong.org/repository/coin-master-100-spin_GM406889139.pdf
    • http://library.gkigadingserpong.org/repository/coin-master-free-link-app_GM406889139.pdf
    • http://library.gkigadingserpong.org/repository/apk-hack-coin-master_GM406889139.pdf
    • http://library.gkigadingserpong.org/repository/coin-master-cheat-engine-hack_GM406889139.pdf
    • http://library.gkigadingserpong.org/repository/how-to-buy-robux-for-free_GM431946152.pdf
    • http://www.library.gkigadingserpong.org/repository/is-free-robux-real_GM431946152.pdf
    • http://library.gkigadingserpong.org/repository/robux-free-robux_GM431946152.pdf
    • http://www.library.gkigadingserpong.org/repository/toolbox-mod_GM479516143.pdf
    • http://www.library.gkigadingserpong.org/repository/free-coins-coin-master-haktuts_GM406889139.pdf
    • http://library.gkigadingserpong.org/repository/best-free-roblox-outfits_GM431946152.pdf
    • http://www.library.gkigadingserpong.org/repository/free-coins-and-spins-in-coin-master_GM406889139.pdf
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://www.library.gkigadingserpong.org/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdf
    • http://www.library.gkigadingserpong.org/repository/coin-master-spin-hack-trick_GM406889139.pdf
    • http://www.library.gkigadingserpong.org/repository/minecraft-diamond-finder-hack_GM479516143.pdf
    • http://library.gkigadingserpong.org/repository/i-got-hacked-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005198.bin
0b0160a19a9eea5553b81e39828488bbfa0e4c7439dc51fcd329bb8348595131		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5198 26584 bytes
font_01_sfnt_off00008f99.bin
ffc67523bfe73ec89e53887d24b89cd55476a66a65a65a77f9db255dc0107ec1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F99 19024 bytes

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