Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cc7519a354df45d…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 08:35:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9039c9b7d666124489292608bdbf1cc9 SHA-1: 567f80a003adbb8181250de1afb2b794504a5019 SHA-256: 8cc7519a354df45d0d04b1f86ac657949a89b1a89190576ebb4d97cc657c6b3e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free in-game currency, directing users to external URLs. The primary URL, http://netcdn.tw/app/406889139/coin-master-free-spins-link-2021-hack-game-hack, is identified as a game hack redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a social engineering attack aimed at tricking users into visiting malicious sites, likely for credential harvesting or malware distribution.

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/406889139/coin-master-free-spins-link-2021-hack-game-hack PDF link annotation
    • https://cnc-xinrong.com.tw/image/data/files/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-robux-no-email-needed_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-robux-obby-no-password-no-human-verification_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-roblox-templates_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/how-to-use-roblox-hack-scripts_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-roblox-bugmenot_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/hack-de-robux-funcionando-2021-100-para-hacer-bromas_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-free-spins-cheat_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_off000031dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31DD 22432 bytes
SHA-256: 3971df9a0c6b99ade6c75766dc206406365237358faed7862f4ff671793ffd21
font_01_sfnt_off000063cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63CF 18748 bytes
SHA-256: 8ee559f3b7bcb41d8d671c9caf17dff0473bece2e90a331a809c0197988e0d0c

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