Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf566cfd51704564…

MALICIOUS

PDF

34.8 KB Created: 2021-07-02 06:15:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2d5071679d69fd91caae15e359da744f SHA-1: e290935a4f70d4b9806fc7e08bd50e5c184dbb46 SHA-256: cf566cfd51704564df76dad3f62fe8b02cd55017edd83f1935d6171a6c9accf5
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 0.9980

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-code-card-free-sin-verification-game-hack PDF link annotation
    • http://multiconfianca.com.br/ckfinder/userfiles/files/hackear-coin-master-sin-verificacion_GM406889139.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/roblox-hacks-mega_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/cm-daily-spins_GM406889139.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/free-roblox-toys_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/how-to-get-free-chat-in-roblox_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/free-robux-no-apps-to-download_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/how-to-hack-on-roblox-huawei-tablet_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/free-coin-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/free-robux-site_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/minecraft_GM479516143.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/no-scam-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_off00003129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3129 22156 bytes
SHA-256: 470352c636568e663aa510102fe699693e264a37824f870ed8c5f31f14023b9f
font_01_sfnt_off0000625f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625F 19184 bytes
SHA-256: d3e5f112d68d33de95e6cfabd9b05cca0109da746e31e9174511e8ca5b61488c

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