Malicious PDF — malware analysis report

Static analysis result for SHA-256 05a089be591a3f68…

MALICIOUS

PDF

42.4 KB Created: 2021-05-13 22:04:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 573f5539f2b62279bc422f565901a4ec SHA-1: e5ad97e71ce87144bfaf501e444b5924fa8903bf SHA-256: 05a089be591a3f686c03e49487ee4dc354fe93356bf9cbe98a5a5b0b990908fc
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, many of which point to SEO-optimized PDF documents. The primary URL, 'https://netcdn.xyz/app/406889139/how-to-hack-golden-card-in-coin-master-game-hack', suggests a lure related to game hacking. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, likely for search engine optimization or to distribute malicious content. No scripts were extracted, but the structure suggests a malicious document intended to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/how-to-hack-golden-card-in-coin-master-game-hack
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-any-verification_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today_GM406889139.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/free-robux-hack_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-heaven-free-spins_GM406889139.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/lucky-patcher-coin-master-hack_GM406889139.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/free-robux-generator-no-human-verification_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/rbx-free-robux_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/minecraft-java-server-hosting-free_GM479516143.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-hack-2021_GM406889139.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/free-coins--spins-coin-master_GM406889139.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-hack-with-facebook-login_GM406889139.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/wahoo-gaming-co-free-robux_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-card-link-free_GM406889139.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/flame-gg-free-robux_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/how-to-get-free-robux-for-free_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-400-spin-link-today_GM406889139.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/roblox-phantom-forces-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ccc.bin
5563ea20d7f87ecbda7ef2f7bae276b3a2c13b9e67fd0720b0317179213fb4dd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CCC 24376 bytes
font_01_sfnt_off000083ec.bin
6e99c01af804bf31f20ebf44881e4bc5fba6244af653fbf7f93a50858f61393b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83EC 18128 bytes

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