Malicious PDF — malware analysis report

Static analysis result for SHA-256 89961861c0a3ecf5…

MALICIOUS

PDF

33.5 KB Created: 2021-06-22 10:33:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6421c19414e279918e4d653567507a87 SHA-1: c30e7af2ca9bbdb12819130f319e87a85b66c022 SHA-256: 89961861c0a3ecf57e0151bf5c1e027930a0c1a15f0eaa82733d98085b418ca9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a lure related to game hacks and free in-game items, strongly suggesting a phishing or scam attempt. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the nature of the lures and embedded links indicates a likely attempt to redirect users to malicious websites, potentially for credential harvesting or further malware delivery.

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.co/app/431946152/how-to-get-free-clothes-on-roblox-on-mobile-game-hack PDF link annotation
    • https://www.tiancom.com.tw/upload/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-latest-version-hack_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/tiktok-likes-free-trial_GM835599320.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/wwwrobloxcom-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/robux-cheat-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-robux-hack-without-downloading_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-make-roblox-hacks_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_off00002e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E70 21304 bytes
SHA-256: 9bb12afeef7cac9f18b1197d5ce3f4020f53e0fdfcdd432cf0b40b996396a012
font_01_sfnt_off00005cff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFF 19400 bytes
SHA-256: 2ada8b56de1ddd7ce0badddf6b697f2d2ed6f16c1d2cc7d1775e4566b91be0c2