Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad121850edf64c63…

MALICIOUS

PDF

36.0 KB Created: 2021-06-22 12:50:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c01bb097093cb92c0af7dfae24026e33 SHA-1: 796d2738f2940828baaf5ee5ffa65a2f9ece0e81 SHA-256: ad121850edf64c63b5a3714f8086f167160847af96158fd9603fc4e8fb8cb62e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are related to game hacks and cheats, indicating a link farm or SEO poisoning tactic. The embedded URL 'http://netcdn.co/app/406889139/spin-coin-master-free-game-hack' is likely intended to redirect users to a malicious download or phishing page. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/406889139/spin-coin-master-free-game-hack
    • https://new.minsatulearning.com/__statics/gudangsoal/files/how-to-find-coin-master-free-spin-link_GM406889139.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-free-2021-spin-link_GM406889139.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/how-to-get-free-gamepasses-on-roblox_GM431946152.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-free-attack-hack_GM406889139.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/free-robux-just-enter-username_GM431946152.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/roblox-free-followers_GM431946152.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/how-to-get-minecraft-realms-for-free_GM479516143.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-free-fire_GM406889139.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-hack-without-root_GM406889139.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/minecraft-hack-client-download_GM479516143.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/microsoft-bing-free-robux_GM431946152.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/minecraft-dungeons-free-download_GM479516143.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-rewards-app_GM406889139.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-stop-attack-hack_GM406889139.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot_GM406889139.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/how-to-hack-accounts-on-roblox-easy_GM431946152.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/how-to-cheat-in-roblox_GM431946152.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-hack-355_GM406889139.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/rbxoffer-com-free-robux_GM431946152.pdf
    • https://new.minsatulearning.com/__statics/gudangsoal/files/free-robux-no-verification-needed_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003505.bin
8b49579260c46a98dfb041487ec90cd4f1d668998a53eca167ba1f50964f9ec5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3505 23648 bytes
font_01_sfnt_off00006a5f.bin
1096432c91a33187bc9c09511f00b7fa0c2395c0afe101c31e464ccb2ed8743e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5F 18176 bytes

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