Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e02f5a02f25399b…

MALICIOUS

PDF

42.4 KB Created: 2021-05-17 12:31:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 4292040c9db38567a5f3dcea532f99db SHA-1: f3b59bd64ff33ff1d146fab4634235e946b026e8 SHA-256: 8e02f5a02f25399bbcd3b5a29bb896a49020d1223e38d41b57fdfb59e5b3e5c7
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 0.9971

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 https://netcdn.xyz/app/431946152/free-robux-no-anti-bot-verification-game-hack PDF link annotation
    • https://cnc-xinrong.com.tw/image/data/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/roblox-robux-hack_GM431946152.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/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-hack-no-download_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-free-robux_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/robuxhub-net_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
stream_003_off00004bb8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BB8 24052 bytes
SHA-256: cc7087f2893eb3ff21dbd253610d7d6d49625534ec08baccfe8b1f300fa299cb
font_01_sfnt_off00008278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8278 18600 bytes
SHA-256: 8cfd8c2479ee29cd4f6dba9b0ab7f96f8a0f4a4bb194f6119df547073888af7b

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