Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb17c0908ed80ed…

MALICIOUS

PDF

44.8 KB Created: 2021-06-11 07:55:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a929a9f324eafddcef32e29ea61f2a43 SHA-1: d201d12d38411a5ebe6583fd24a1b7dc3ac93b6e SHA-256: 1fb17c0908ed80edb25630bec0d8085e96d65f61198cf05c8f767b595dcd0543
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document displays a fake CAPTCHA, a common lure to trick users into performing an action that could lead to malware execution. The presence of multiple external URLs suggests an attempt to redirect the user to malicious content or download a payload. No scripts were extracted from this sample, limiting the ability to determine the exact execution flow.

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/costume-roblox-free-game-hack
    • http://eddegrootassurantien.nl/images/roblox-robux-generator_GM431946152.pdf
    • http://eddegrootassurantien.nl/images/how-to-get-minecraft-for-free-on-pc_GM479516143.pdf
    • http://eddegrootassurantien.nl/images/free-robux-for-kids-no-verification_GM431946152.pdf
    • http://eddegrootassurantien.nl/images/free-tiktok-followers-generator_GM835599320.pdf
    • http://eddegrootassurantien.nl/images/coin-master-hack-355_GM406889139.pdf
    • http://eddegrootassurantien.nl/images/pagina-hacker-de-roblox_GM431946152.pdf
    • http://eddegrootassurantien.nl/images/coin-master-hack-root_GM406889139.pdf
    • http://eddegrootassurantien.nl/images/how-do-you-get-minecraft-for-free_GM479516143.pdf
    • http://eddegrootassurantien.nl/images/how-to-get-unlimited-money-i-roblox-hack_GM431946152.pdf
    • http://eddegrootassurantien.nl/images/coin-master-free-spins-blogspot_GM406889139.pdf
    • http://eddegrootassurantien.nl/images/how-to-get-free-robux-on-iphone_GM431946152.pdf
    • http://eddegrootassurantien.nl/images/free-robux-instantly_GM431946152.pdf
    • http://eddegrootassurantien.nl/images/coin-master-daily-free-spins-link_GM406889139.pdf
    • http://eddegrootassurantien.nl/images/coin-master-free-coins-and-spins-2021_GM406889139.pdf
    • http://eddegrootassurantien.nl/images/robux-com-free-robux_GM431946152.pdf
    • http://eddegrootassurantien.nl/images/free-spins-coin-master-daily_GM406889139.pdf
    • http://eddegrootassurantien.nl/images/free-robux-without-verification-or-survey_GM431946152.pdf
    • http://eddegrootassurantien.nl/images/how-to-get-minecraft-for-free-on-mac_GM479516143.pdf
    • http://eddegrootassurantien.nl/images/how-to-hack-roblox-no-download_GM431946152.pdf
    • http://eddegrootassurantien.nl/images/coin-master-free-spin-today_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005094.bin
939a4d25bb45190089e4085f6896b245e922315251c10975efe6e38bf4de209b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5094 26000 bytes
font_01_sfnt_off00008bfa.bin
e8755f249f21f7c93552f29d2fcc951008a57f21bf34a4fcf882241c97ff267f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFA 18452 bytes

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