Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2de2396ea4a23db…

MALICIOUS

PDF

33.7 KB Created: 2021-07-04 03:38:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 35dea0b3f0b7b15f3721c318364ec657 SHA-1: 4fe1ea258e5898a216e3170f5431f08b60ea6cf8 SHA-256: d2de2396ea4a23dbd14036b6b8d104d68bec91413abd55e577dd04d4493141d6
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/479516143/play-minecraft-for-free-on-pc-game-hack PDF link annotation
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/claim-robux_GM431946152.pdfIn PDF document text
    • 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/coin-monster_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/beyond-cheat-roblox_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/android-coin-master-3433-apk-hack_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-1-hundred-robux_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/robuxhub-net_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-robux-hack_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_off00002fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDD 22100 bytes
SHA-256: bd3561521c4e73837cba0ccc7e971b1c2c54fa8bb700dc76c4ff447bf271a340
font_01_sfnt_off000060bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BB 18408 bytes
SHA-256: 21b2137426b476267ea7c0394b250426d475a18dc6e7bf5e59e9a16705a70499

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