Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3e50f5e6d9f60c6…

MALICIOUS

PDF

35.7 KB Created: 2021-06-29 22:31:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: bd9b6d8580a0e38ad49ad1cc56731918 SHA-1: db099119f3bfa8e5bd6d79f6180e7eb2ca5ae04d SHA-256: c3e50f5e6d9f60c68eb5a60c7fae3461109b80cf879fc508ae6159e5b4044d50
82 Risk Score

Malware Insights

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

The PDF document contains multiple links and a call-to-action phrase, explicitly luring users with promises of free game currency and hacks for popular games like Roblox. The primary link, http://netcdn.co/app/431946152/roblox-player-download-2021-free-game-hack, is highly suspicious and likely leads to a malicious download or phishing page. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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 http://netcdn.co/app/431946152/roblox-player-download-2021-free-game-hack PDF link annotation
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/roblox-robux-hack-no-survey-no-password-2021_GM431946152.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/hack-account-roblox-edit-this-cookies-2021_GM431946152.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/new-free-robux-roblox-promocode-gives-50m_GM431946152.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/instant-robux_GM431946152.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/free-account-in-roblox-real_GM431946152.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/free-robux-fo-rreal_GM431946152.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/how-to-hack-account-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/rpg-world-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/javascript-free-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_off000032e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32E4 22184 bytes
SHA-256: 5dd8a941e2ec89c277e14de1f31cbd886438c3370e183cbb9a134ec9a7896898
font_01_sfnt_off000063cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63CB 19892 bytes
SHA-256: 8d0da55eeaefee7c365f5b088e4e73806d32263d1e9c904ac9adcbc6adb82966

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