Malicious PDF — malware analysis report

Static analysis result for SHA-256 826b1ed1d187c910…

MALICIOUS

PDF

35.3 KB Created: 2021-06-26 06:50:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3da463724f031b5f2b8423e14c947909 SHA-1: 57a644b2161a974578e800f9b65b0e397af1d221 SHA-256: 826b1ed1d187c910aabbe9543761bb1e9f1bbaae8df6104231a9a7cbd545eb04
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a document body that promotes 'free' game hacks and exploits 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 cheats. The ML classifier also flagged this PDF as malicious with high confidence.

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/how-to-get-free-broken-egg-in-roblox-rpg-world-game-hack
    • http://pustaka.ffarmasi.unand.ac.id/repository/visenya-roblox-hack_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/free-robux-no-generator-no-human-verification_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/can-using-free-models-on-roblox-get-you-baanned_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/cheat-engine-62-roblox-mac_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/how-to-install-a-hacked-client-roblox-mac_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/el-pacmero-hack-roblox-robux_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/roblox-accounts-hacken_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/free-robux-games-on-roblox_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/infinity-heroes-roblox-hack_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/robloxmatchcom-free-robux_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/free-robux-guy_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/how-to-speed-hack-in-legendary-football-roblox_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/free-promo-codes-for-robux_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/free-robux-no-verification-2021-ios_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/free-roblox-gift-card-codes-generator-no-survey_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/como-hackear-la-ropa-de-personas-en-roblox_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/roblox-hack-script-pee-pee_GM431946152.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/free-coins-coin-master-link_GM406889139.pdf
    • http://pustaka.ffarmasi.unand.ac.id/repository/roblox-tiny-tanks-cheats_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003039.bin
1e83d4097afb6001b42b6730509940471f538f5474ba9448c0fb978082194806		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3039 22656 bytes
font_01_sfnt_off000062e5.bin
910852ca153562a7a79467386124b871b452a5a87dd1137350b30fc1a8bd5c93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62E5 19636 bytes

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