Malicious PDF — malware analysis report

Static analysis result for SHA-256 76fb7c06ab7c9cd4…

MALICIOUS

PDF

42.2 KB Created: 2021-05-16 15:41:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a26fc1a08f81f69f0793304eb3f2d664 SHA-1: 0700084003cf09564ecb5b05340687c8316e34af SHA-256: 76fb7c06ab7c9cd4e96969d80dd8a55eaefff4f87835e86f30cbf3f6f23450c1
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 interacting with malicious links. The primary link, https://netcdn.xyz/app/431946152/how-to-get-free-robux-on-android-game-hack, is likely intended to download a second-stage payload or redirect to a phishing site. While no scripts were explicitly extracted, the presence of embedded URLs and the fake CAPTCHA heuristic strongly suggest a social engineering attack.

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/431946152/how-to-get-free-robux-on-android-game-hack PDF link annotation
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/coin-master-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/master-coin-hack-game_GM406889139.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/free-spin-card-exchange-coin-master_GM406889139.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/roblox-com-www_GM431946152.pdfIn PDF document text
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/my-robux_GM431946152.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
font_00_sfnt_off000049af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49AF 24660 bytes
SHA-256: 2bb7ac509026fd4a3c1782a5b0283d5ebb6959684d94e73ba314263e039fb226
font_01_sfnt_off000081c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C3 18576 bytes
SHA-256: be12fe34256d848f1a7db569f7882c3333b0548de7731ecd127307da0fa566a6

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