Malicious PDF — malware analysis report

Static analysis result for SHA-256 71806bd0da6fe928…

MALICIOUS

PDF

34.5 KB Created: 2021-06-25 11:32:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b00f82c79a909bd161ce1950a888cf4e SHA-1: 7e1465f1b2f6ebfdd8e6c637adcfe1d83da2643a SHA-256: 71806bd0da6fe92831bf750174e94d036426b7c8b675edb722bbdd1ec79a8f57
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links, many of which are related to game hacks and cheats, specifically for Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users searching for such content. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to click on these links, which likely lead to malware downloads or phishing sites.

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/roblox-shouting-simulator-hack-game-hack
    • http://pustaka.ffarmasi.unand.ac.id/repository/roblox-hack-me_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/how-to-get-free-robux-2021-easy_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/is-hacking-roblox-a-crime_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/cheat-engine-65-roblox_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/how-to-get-free-robux-no-hack-2021_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/free-items-on-roblox-pastebin_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/como-hackear-ordenador-en-roblox-cuentas_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/terminal-railways-have-a-train-free-roblox_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/roblox-prison-life-free-swat_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/minecraft-pe-free-download_GM479516143.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/how-to-get-more-robux-for-free_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/download-free-mundschutz-for-roblox_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/roblox-summoner-tycoon-hack_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/master-coin-free-spin_GM406889139.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/best-roblox-games-to-hack-in_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/code-free-roblox_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/how-to-get-free-robux-no-generator-ios_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/roblox-hacks-dll-downloads_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/how-to-use-cheats-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_off00002f74.bin
da12f69b0913c96b62e14cc12252fb0e6a5c2d0dcd264b71f08765fec1328465		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F74 22152 bytes
font_01_sfnt_off000060ce.bin
b936501e35ccdaa2ae250d91047fdc8beba196940c39f49b9b5abbdd1fdb77f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60CE 19444 bytes

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