Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad306ebe1a99667…

MALICIOUS

PDF

44.7 KB Created: 2021-05-16 02:42:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8411386417383d24ec3e55f4f3e3febe SHA-1: d242f44f7efa342e8675e872716f21f63fd0e246 SHA-256: 9ad306ebe1a996670fe366940aba852bde8d74a9dc938f24f9d8d67bb348b4e3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO link farms for game-related cheats and free items. The ML classifier strongly indicated maliciousness, and the presence of external URIs suggests a potential for phishing or malware distribution. The document body, though heavily obfuscated, contains references to 'Coin Master Twitter Free Spins' and URLs that align with the link farm heuristic, indicating a lure for users seeking in-game advantages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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 https://netcdn.xyz/app/406889139/coin-master-twitter-free-spins-game-hack
    • http://suaedy-library.net/repository/roblox-gift-card-online-free_GM431946152.pdf
    • http://suaedy-library.net/repository/free-robux-only-username_GM431946152.pdf
    • http://suaedy-library.net/repository/roblox-redeem-codes-free_GM431946152.pdf
    • http://suaedy-library.net/repository/daily-coin-master-free-spin-link_GM406889139.pdf
    • http://suaedy-library.net/repository/free-robux-apps-that-work_GM431946152.pdf
    • http://suaedy-library.net/repository/how-to-get-free-roblox-items_GM431946152.pdf
    • http://suaedy-library.net/repository/free-spins-on-coin-master-link_GM406889139.pdf
    • http://suaedy-library.net/repository/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdf
    • http://suaedy-library.net/repository/how-to-get-free-robux-without-email_GM431946152.pdf
    • http://suaedy-library.net/repository/how-do-you-get-free-food-on-coin-master_GM406889139.pdf
    • http://suaedy-library.net/repository/wurst-18-9_GM479516143.pdf
    • http://suaedy-library.net/repository/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdf
    • http://suaedy-library.net/repository/free-spins-and-coins-from-coin-master-game_GM406889139.pdf
    • http://suaedy-library.net/repository/free-robux-cards_GM431946152.pdf
    • http://suaedy-library.net/repository/legit-coin-master-hack-without-verification_GM406889139.pdf
    • http://suaedy-library.net/repository/free-coins-coin-master-today_GM406889139.pdf
    • http://suaedy-library.net/repository/minecraft-free-download-mac-full-version-2021_GM479516143.pdf
    • http://suaedy-library.net/repository/free-spin-coin-master-online_GM406889139.pdf
    • http://suaedy-library.net/repository/coin-master-free-spin-link-list_GM406889139.pdf
    • http://suaedy-library.net/repository/how-to-create-group-in-coin-master-free-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000483c.bin
9611ab285327ef3fdc8e82e209fb2814c6f1c8afbf528a86bd0124c65f179580		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x483C 25388 bytes
font_01_sfnt_off000082cf.bin
10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82CF 2880 bytes
font_02_sfnt_off00008cba.bin
d5c713e21d1796f9829cfc955fe60add37e43b6f073cef82b9d1bf41a9ab85b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CBA 18052 bytes

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