Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a7b70cedec898ec…

MALICIOUS

PDF

33.2 KB Created: 2021-07-06 14:13:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cc6ffd61038ec0fc9a36b7c0c1917c62 SHA-1: 2e45492c9866f6ccc3b5de60afc446e22e131c41 SHA-256: 1a7b70cedec898eca874c394d72d96d1a7df86300c57929f8b8f62f2fcd71da1
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, including one at http://netcdn.tw/app/431946152/get-roblox-for-free-game-hack, which likely serves as a lure for downloading malware. The document body and embedded URLs suggest a scam aimed at users seeking game cheats or free items. The presence of a PDF URI heuristic and the ML classifier's high confidence score indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.tw/app/431946152/get-roblox-for-free-game-hack
    • https://abellamoveis.com.br/ckfinder/userfiles/files/free-spins-coin-master-links_GM406889139.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/wurst-client_GM479516143.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/minecraft-hax-download-no-virus_GM479516143.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/how-to-get-a-hacker-off-your-roblox-account_GM431946152.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/get-free-spins-in-coin-master_GM406889139.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/coin-master-spin-link_GM406889139.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/minecraft-bedrock-edition-pc-free_GM479516143.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/100-free-spins-coin-master-2021_GM406889139.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/roblox-no-clip-hack_GM431946152.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/free-roblox-generator_GM431946152.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/cm-free-spins_GM406889139.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/roblox-hacks-online-no-download_GM431946152.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/roblox-promocode-hack-robux-pastebin_GM431946152.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/minecraft-bedrock-free-server-hosting_GM479516143.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/how-to-get-animation-packs-for-free-on-roblox_GM431946152.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/how-do-we-get-free-robux_GM431946152.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/free-robux-scam-obby_GM431946152.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/how-to-get-20210-robux-on-roblox-no-hacks_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b4f.bin
9b15a912359d31208872f2a8c0abf448ed278a50cc974061664fecd36f5e3735		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B4F 22548 bytes
font_01_sfnt_off00005dea.bin
ac094eb52ccb986f6b44c8fe8172adec631737b698f2a1f393908779c64ca42c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DEA 18752 bytes

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