Malicious PDF — malware analysis report

Static analysis result for SHA-256 62dfbfc4239909b4…

MALICIOUS

PDF

45.3 KB Created: 2021-05-12 08:05:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 44225171b6a85ab5ec997417d5bf63b2 SHA-1: 7403155726c00c033056e11a670a073fa9df611e SHA-256: 62dfbfc4239909b4c7fe6017caf921fcff31e415e6824ca19187597c8d56c4c7
82 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA lure to trick users into interacting with malicious links, specifically offering 'free Robux'. The document contains numerous embedded URLs, including a prominent one pointing to 'netcdn.xyz', which likely serves as a landing page for the scam or a download source for further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the observed social engineering tactics.

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/free-robux-without-human-verification-2021-game-hack
    • http://digilib.akbidarrahma.ac.id/repository/get-free-robux-without-doing-anything_GM431946152.pdf
    • http://digilib.akbidarrahma.ac.id/repository/free-robux-no-verification-no-survey_GM431946152.pdf
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-deals_GM406889139.pdf
    • http://digilib.akbidarrahma.ac.id/repository/is-minecraft-vr-free_GM479516143.pdf
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-hacks-no-surveys_GM406889139.pdf
    • http://digilib.akbidarrahma.ac.id/repository/robux-websites-2021_GM431946152.pdf
    • http://digilib.akbidarrahma.ac.id/repository/free-minecraft-account-and-password-generator_GM479516143.pdf
    • http://digilib.akbidarrahma.ac.id/repository/roblox-hack-me-robux_GM431946152.pdf
    • http://digilib.akbidarrahma.ac.id/repository/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdf
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-link-app_GM406889139.pdf
    • http://digilib.akbidarrahma.ac.id/repository/minecraft-free-demo_GM479516143.pdf
    • http://digilib.akbidarrahma.ac.id/repository/free-spins-coin-master-links-app_GM406889139.pdf
    • http://digilib.akbidarrahma.ac.id/repository/free-2021-robux_GM431946152.pdf
    • http://digilib.akbidarrahma.ac.id/repository/daily-coin-master-free-spin-link-facebook_GM406889139.pdf
    • http://digilib.akbidarrahma.ac.id/repository/download-coin-master-free-spins-link-2021-today_GM406889139.pdf
    • http://digilib.akbidarrahma.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdf
    • http://digilib.akbidarrahma.ac.id/repository/robux-no-human-verification_GM431946152.pdf
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-hack-apk-33-download_GM406889139.pdf
    • http://digilib.akbidarrahma.ac.id/repository/blox-world-free-robux_GM431946152.pdf
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-free-spins-1701-20_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c5e.bin
ca9dc25c3ef2e1ad74ae65d499b38907dc0bbed02c862ce4854dd04219561966		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C5E 26588 bytes
font_01_sfnt_off00008ac1.bin
5c907f8fc0171ac382cbe47737dfe307495a07ea2f2097b2a41ed37680731fb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC1 19624 bytes

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