Malicious PDF — malware analysis report

Static analysis result for SHA-256 117fc519d36187a3…

MALICIOUS

PDF

43.2 KB Created: 2021-05-19 23:07:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5fee3dc2e32422f815f2a015ddd08d93 SHA-1: d10018642cb3996861065a27101ba87bdfab6aaf SHA-256: 117fc519d36187a3d932e44d0a381f69add2dd74b29a388eb5804d0bc0e4e50d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which point to other PDF files designed to appear as legitimate downloads for game cheats and hacks. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. The document's primary function appears to be acting as a link farm to distribute malware or engage in other malicious activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/free-unlimited-coins-for-coin-master-game-hack
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-hack-ios-no-human-verification_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id/repository/easy-how-to-get-free-robux_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-free-spins-daily-2021_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id//repository/daily-spin-and-coin_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-cheats-and-hacks_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id//repository/mistplay-robux_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-free-coins-links-2021_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id//repository/free-premium-roblox_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/free-spins-coin-master-2021-today_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id/repository/free-shirt-templates-roblox_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/daily-free-spins-coin-master_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id//repository/how-to-get-free-robux-without-verifying_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/free-roblox-codes-2021_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id//repository/pokemon-go-free-team-change_GM1094591345.pdf
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-free-spins-ios-app_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id//repository/tiktok-free-likes-no-survey_GM835599320.pdf
    • http://www.perpustakaan.unda.ac.id/repository/how-to-log-out-of-coin-master_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id/repository/robux-offers_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id//repository/wurst-client-112-2_GM479516143.pdf
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-free-spins-hacktman_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004942.bin
943ebf668875b1d64c1f5cbd83aab6bde3c396f719967827c71e9a373afe8ead		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4942 29032 bytes
font_01_sfnt_off00008628.bin
4a7e9deaced5a20a88dfb6f0cb6950193ff13fb4f66a813a778aefd0257287c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8628 18404 bytes

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