Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eb81130e73b7c9a…

MALICIOUS

PDF

33.4 KB Created: 2021-07-19 16:14:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6bdf0dd4a47106bdf074eced39a85a14 SHA-1: 4d245c783b8f2d74181d936537ac0e5e5c873340 SHA-256: 7eb81130e73b7c9a7d9454f193124a917d33f51dae0a2fcb49b6c2a8b911f561
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link to a website promising 'how to hack Roblox games', which is a common lure for malicious content. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to potentially harmful content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.tw/app/431946152/how-to-hack-roblox-games-game-hack PDF link annotation
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://shop.mercurytekindo.co.id/ckfinder/userfiles/files/how-can-you-get-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_off00002bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BC9 22804 bytes
SHA-256: a5f709d9bd6b7344c53428c4462af11e3a70d0e6731c60363cdeea9fc4bcfc1d
font_01_sfnt_off00005eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEA 18792 bytes
SHA-256: d2b3beaa7eaf02760ea0d23881cf6f3b718e872fdf4e4ab20a27c33912326b97

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