Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc2d4d41a636f3d1…

MALICIOUS

PDF

42.7 KB Created: 2021-05-11 19:10:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e719eb26d1001dc6f046ec3852b95868 SHA-1: 871b23d46af6dc7adf25f2cfe4bec1746d7dfb63 SHA-256: dc2d4d41a636f3d15a68c4fac68d2effc686dab4e92641b72f503ada676654cd
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9971

Heuristics 5

  • 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.
  • 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/roblox-money-hack-game-hack PDF link annotation
    • http://www.jewelspell.com/uploaded_files/userfiles/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/coin-master-link-spin_GM406889139.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/block-best-robux_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/free-coin-spin-daily-link-coin-master_GM406889139.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/apps-for-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_off0000497f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x497F 25556 bytes
SHA-256: 2fc132d2a252fc6f77498c68542b22f8df8838be507831cfef4a3ba5917c1266
font_01_sfnt_off0000837c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x837C 18560 bytes
SHA-256: 2877ec179c3d1975899223932944ba0d35aae080e47210864d1f1454656c8d43

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