Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad16e50d6ff8ee3d…

MALICIOUS

PDF

35.8 KB Created: 2021-07-01 17:42:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7ddc6809e364e246faad6ad497191b11 SHA-1: 211f7dda8f0902d0e61f23bf1ace64a77769aae0 SHA-256: ad16e50d6ff8ee3d323568598eda627487f36df871b24132eb9d0d0d1079a175
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks and free in-game currency, directing users to the URL http://netcdn.co/app/431946152/how-to-cheat-on-roblox-2021-game-hack. This URL is likely to host a malicious payload or lead to further phishing attempts. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure and embedded URLs.

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-cheat-on-roblox-2021-game-hack PDF link annotation
    • https://www.yantan.com.tw/upload/files/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-get-free-1-million-robux_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/minecraft-wurst_GM479516143.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/roblox-roblox-hack-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/roblox-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-robux-hack-no-human-verification-or-download_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/fabulousv2-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/roblox-slaying-simulator-cheats_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-roblox-animations_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-noclip-in-roblox-without-cheat-engine-2021_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_off00003368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3368 22520 bytes
SHA-256: 907bb7c7e7d3e54ee80cfdbf9cffad941f5e9902afaa6cfd078b51ea39a33c15
font_01_sfnt_off000065dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65DC 19320 bytes
SHA-256: 8244ef88a5e3a6a7f77b7c68a2cc474ff62e0a92176e09b2aabb0521137b912f