Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e291a08872b170a…

MALICIOUS

PDF

45.1 KB Created: 2021-06-07 10:14:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 240107b7f051cbc49fcd91cf21065a9d SHA-1: 7d48ea8b3f720cdb7aceee90bb0404148beb7fbe SHA-256: 1e291a08872b170a0c8a32059a26e85589a983e7152bf81fb67cb313578f1d53
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into clicking malicious links. The embedded URL and numerous other URLs point to sites offering game hacks and cheats, suggesting a social engineering tactic to deliver malware or facilitate scams. No scripts were extracted, but the presence of external URIs and the fake CAPTCHA heuristic strongly indicate a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/roblox-design-it-hack-game-hack
    • http://rushxpress.de/images/is-minecraft-free_GM479516143.pdf
    • http://rushxpress.de/images/free-minecraft-client_GM479516143.pdf
    • http://rushxpress.de/images/free-roblox-intros_GM431946152.pdf
    • http://rushxpress.de/images/coin-master-free-spins-no-survey_GM406889139.pdf
    • http://rushxpress.de/images/how-to-get-free-robux-generator_GM431946152.pdf
    • http://rushxpress.de/images/free-minecraft-gift-codes_GM479516143.pdf
    • http://rushxpress.de/images/free-domain-for-minecraft-server_GM479516143.pdf
    • http://rushxpress.de/images/how-to-get-roblox-premium-for-free_GM431946152.pdf
    • http://rushxpress.de/images/robux-claimer_GM431946152.pdf
    • http://rushxpress.de/images/coin-master-hack-account_GM406889139.pdf
    • http://rushxpress.de/images/how-to-hack-coin-master-spin-ios_GM406889139.pdf
    • http://rushxpress.de/images/coin-master-daily-free-spins-link-today-2021_GM406889139.pdf
    • http://rushxpress.de/images/coin-master-free-spin-best-link_GM406889139.pdf
    • http://rushxpress.de/images/collect-free-spin-linms-coin-master_GM406889139.pdf
    • http://rushxpress.de/images/roblox-dubliezieren-hack_GM431946152.pdf
    • http://rushxpress.de/images/robuxy-com-generator_GM431946152.pdf
    • http://rushxpress.de/images/coin-master-reward-link_GM406889139.pdf
    • http://rushxpress.de/images/coin-master-free-cards-hack_GM406889139.pdf
    • http://rushxpress.de/images/coin-master-free-2021-spin-link_GM406889139.pdf
    • http://rushxpress.de/images/free-robux-no-verification-no-download-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fa6.bin
46578d742d7b6755a052c4bbf3d1cbc94c5bf3afc12cca7b5ba3806b506fe38f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FA6 26316 bytes
font_01_sfnt_off00008be9.bin
8f32df0abec13c1c4977a6c2c5b7b26ade845529a1ac17511c8844ac916fc3c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE9 18864 bytes

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