Malicious PDF — malware analysis report

Static analysis result for SHA-256 30119194591228e5…

MALICIOUS

PDF

49.2 KB Created: 2021-06-07 04:02:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c5cd983cea4d0e065e64a64b376cacfc SHA-1: 096675e54d1c6a6da5a6c8cc74545d30ca4ea023 SHA-256: 30119194591228e5e0dfac3d1b746ebb44b2b2c376792cd1cdf75b33f155d0ef
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a URL in its body, masquerading as download pages for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract traffic and potentially lead users to malicious sites. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/roblox-download-for-free-zombie-games-game-hack
    • http://perpustakaan.sman2bondowoso.sch.id/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/can-you-get-minecraft-for-free-on-pc_GM479516143.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-no-download-app-but-play-for-free_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/get-me-robux-for-free_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-free-daily-spins-today_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/minecraft-free-ios-2021_GM479516143.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/minecraft-hacked-client-bedrock_GM479516143.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-heaven-free-spins-today_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-33-hack-version-download_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/scary-larry-roblox_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/how-to-get-minecraft-coins-for-free_GM479516143.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/minecraft-education-edition-free-download_GM479516143.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/roblox-skins-boy-free_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/games-to-get-free-robux_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/what-is-wurst_GM479516143.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/robux-gift-card-free_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-minecraft-capes_GM479516143.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-free-generator_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/how-to-get-free-robux-on-android_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052fd.bin
efc974a11229350a47d459eb050b805e9bdcf155c1a37531d013618017e55265		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52FD 27960 bytes
font_01_sfnt_off0000916a.bin
77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x916A 2832 bytes
font_02_sfnt_off00009b1b.bin
5c52fa209de767726b75d8306283f6017c43faf96cb92d84d0b09729a6cb5789		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B1B 19156 bytes

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