Malicious PDF — malware analysis report

Static analysis result for SHA-256 af0ea86aaeb4f994…

MALICIOUS

PDF

36.0 KB Created: 2021-07-03 22:43:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 30adb914cafa6e462e99107ad64498c9 SHA-1: a9df719d0af49a98a076a7c6f36a14aef5b40f42 SHA-256: af0ea86aaeb4f9942b5920498d8856b55af2b575b47b556f975427f7ff2a8802
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/earn-robux-sites-game-hack PDF link annotation
    • http://winnerwater.com.tw/image/data/files/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/roblox-free-50-robux_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/google-roblox-games_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/gun-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/hacks-for-roblox-working-weapons_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/roblox-jailbreak-money-hack-download-2021_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/free-gametest1robloxcom-accounts_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/how-to-hack-roblox-games-with-artmoney_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/roblox-ultimate-driving-2-westover-islands-free-job_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/roblox-robux_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/roblox-hack-sin-verificacion-humana_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/mcpe-client_GM479516143.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/hacker-coin-master_GM406889139.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_off00003535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3535 23320 bytes
SHA-256: 01df52395700b87ceea058d17bf86b977fc13a9a2d0f359bc94df697ad2109ce
font_01_sfnt_off000068a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A2 18776 bytes
SHA-256: a32b3e6dbff7e8447fa3fafa775b9c29fe3860dcd5364280a3e271ae0026b346

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