Malicious PDF — malware analysis report

Static analysis result for SHA-256 d285a170db46228a…

MALICIOUS

PDF

35.3 KB Created: 2021-07-03 17:15:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 214cae9c5f95fcb37db3d8905db7cd47 SHA-1: c8b95b6db7c0ee9c7d6af9ef09a89f615ff49940 SHA-256: d285a170db46228a1ae99176f3b4e01a93ca3b0420fbe84018a08372e1bf3450
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 hosted on suspicious domains and offer 'free' game-related items or cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a tactic to drive traffic to potentially malicious sites. The presence of a download button lure further supports the malicious intent of directing users to download untrusted content.

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.tw/app/431946152/roblox-army-free-robux-game-hack
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/how-to-buy-robux-for-free_GM431946152.pdf
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/coin-master-hack-without-verification-2021_GM406889139.pdf
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/how-to-get-free-followers-on-tiktok_GM835599320.pdf
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdf
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/cheat-engine-62-roblox_GM431946152.pdf
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/free-minecraft-alt-generator_GM479516143.pdf
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/wurst-client-18-9_GM479516143.pdf
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/minecraft-bedrock-free_GM479516143.pdf
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/a-lot-of-robux_GM431946152.pdf
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/how-to-change-your-username-on-roblox-free_GM431946152.pdf
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/how-to-get-free-t-shirts-roblox_GM431946152.pdf
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/how-to-get-free-roblox-hair_GM431946152.pdf
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/roblox-royale-high-for-free_GM431946152.pdf
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdf
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/find-people-in-roblox-cheat_GM431946152.pdf
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/free-coins-coin-master-link-2021_GM406889139.pdf
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/robux-hack-generator-no-veriy-100_GM431946152.pdf
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/how-to-get-your-robux-back-without-hacking-or-buying_GM431946152.pdf
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/paginas-de-hacks-para-roblox-robux-gratis_GM431946152.pdf
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/how-to-get-free-clothing-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031f5.bin
ab368d5a5cac9d696de4003bc5c2034276e81a82dade3c30cc3d19b5d365b43c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31F5 22580 bytes
font_01_sfnt_off00006468.bin
5339edd26a46d5c8fe04f627c79d78710f89e028f0bde03da11f3fdfc149047d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6468 19228 bytes

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