Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad7661ee29891851…

MALICIOUS

PDF

34.4 KB Created: 2021-06-20 04:48:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 05636db28fe84c60fb30f415dd6c6fee SHA-1: 6b1f7a125304bb6e53161e1ee0dbb757383908a6 SHA-256: ad7661ee29891851486c1c6ce8037b34e755361cfb42049d517641f02ef389ca
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which are part of a link farm designed to attract users with promises of free game currency or cheats. The ML classifier and the PDF SEO Link Farm heuristic strongly indicate malicious intent, likely to redirect users to sites hosting malware or phishing content. No scripts were extracted, but the document's structure and embedded URLs suggest a lure for initial access, potentially via a malicious download.

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/431946152/free-robux-promo-code-for-blox-land-game-hack
    • http://perpustakaan.stikim.ac.id/slims/repository/free-spins-and-coins-for-coin-master_GM406889139.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-daily-free-spin-app_GM406889139.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/need-free-spins-for-coin-master_GM406889139.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/get-free-spins-coin-master-october-2021_GM406889139.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/roblox-wall-hacks-2021_GM431946152.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/download-hacks-for-roblox-cheating-in-assasin_GM431946152.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/free-minecraft-account-and-password-2021_GM479516143.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/free-spins-coin-master-daily_GM406889139.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/free-robux-no-verification-2021_GM431946152.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/how-to-get-shiny-teeth-in-roblox-for-free_GM431946152.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/roblox-svg-free_GM431946152.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/como-hackear-coin-master-gratis_GM406889139.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/best-free-minecraft-servers_GM479516143.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/hacked-roblox-game_GM431946152.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-free-spins-2021_GM406889139.pdf
    • http://perpustakaan.stikim.ac.id/slims/repository/hack-coin-master-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003041.bin
22462273294b96d0f2901276bf44e267842248aa342e80ded55abdb001123af0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3041 21868 bytes
font_01_sfnt_off0000609b.bin
afb241984b633f24e4ae700790985f9b4ad3167b4479ca70f611e437460ed818		 pdf-font-stream PDF embedded font (sfnt) at offset 0x609B 19380 bytes

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