Malicious PDF — malware analysis report

Static analysis result for SHA-256 cba1d11d6233d9d9…

MALICIOUS

PDF

35.7 KB Created: 2021-07-04 13:13:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 34053e295714e57be85c333109be282d SHA-1: abc99cf6240f42e53c904ee17fceb86d56d4fbd9 SHA-256: cba1d11d6233d9d9448cf52c458a651d62ff9f05459baac63f121e36fc71b91d
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.tw/app/431946152/free-robux-group-payouts-game-hack PDF link annotation
    • http://lib3tell.stptrisakti.net//repository/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/robux-hack-sex_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-spin-link-for-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/pubg-uc-qiwi_GM1330123889.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-mgui-roblox_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/how-to-get-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/get-free-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/cheats-on-roblox-money_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_off0000315d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x315D 23128 bytes
SHA-256: 030c3050d4a9e9c64f89809d0647d904358b95361a0508c6d92840900db6ce5f
font_01_sfnt_off00006574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6574 19332 bytes
SHA-256: 037bae83bb889f51f40ee04106dd8c63976853147050f5621b1f1569a1c37875

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