Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c640ce6106b0711…

MALICIOUS

PDF

33.3 KB Created: 2021-06-27 16:49:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 67086e49cd7aea48ec7bc122d2c249e7 SHA-1: da1c2c41d2ea8821072a66bb302eaebdd6064272 SHA-256: 8c640ce6106b0711226bae1e7f5aed25a0c3abc7a0f05cf6e2bcebb53948e603
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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-infinity-rpg-hack-game-hack PDF link annotation
    • http://bidship.co.za/uploaded_files/userfiles/files/earn-free-robux-videos_GM431946152.pdfIn PDF document text
    • http://bidship.co.za/uploaded_files/userfiles/files/facebook-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://bidship.co.za/uploaded_files/userfiles/files/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • http://bidship.co.za/uploaded_files/userfiles/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://bidship.co.za/uploaded_files/userfiles/files/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://bidship.co.za/uploaded_files/userfiles/files/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • http://bidship.co.za/uploaded_files/userfiles/files/how-do-you-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://bidship.co.za/uploaded_files/userfiles/files/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
    • http://bidship.co.za/uploaded_files/userfiles/files/my-roblox-girlfriend-cheated-on-me_GM431946152.pdfIn PDF document text
    • http://bidship.co.za/uploaded_files/userfiles/files/free-robux-just-name-user_GM431946152.pdfIn PDF document text
    • http://bidship.co.za/uploaded_files/userfiles/files/how-do-you-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://bidship.co.za/uploaded_files/userfiles/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://bidship.co.za/uploaded_files/userfiles/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://bidship.co.za/uploaded_files/userfiles/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://bidship.co.za/uploaded_files/userfiles/files/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://bidship.co.za/uploaded_files/userfiles/files/robux-offer-wall_GM431946152.pdfIn PDF document text
    • http://bidship.co.za/uploaded_files/userfiles/files/bleu-roblox-mega-free_GM431946152.pdfIn PDF document text
    • http://bidship.co.za/uploaded_files/userfiles/files/free-robux-codes-december-2021_GM431946152.pdfIn PDF document text
    • http://bidship.co.za/uploaded_files/userfiles/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://bidship.co.za/uploaded_files/userfiles/files/admin-command-hack-guide-roblox_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_off00002be0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BE0 22152 bytes
SHA-256: e1bbe8fa5bafe5786198a941c5d60b27c6773ad0d3e90c3ff41f4ace23e2ec41
font_01_sfnt_off00005caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CAA 19236 bytes
SHA-256: 2cfd32e8d99546e2c7b100f5696d73bf2fafce39e7a7298e473d5eb193063639

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