Malicious PDF — malware analysis report

Static analysis result for SHA-256 e77c4bee3b39463d…

MALICIOUS

PDF

35.2 KB Created: 2021-06-26 17:10:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 428144874f68629fb86c4d17861df0fe SHA-1: 704e3949bb38bc02b316f44777923011f2189b15 SHA-256: e77c4bee3b39463d1fb3f78d4469c54a80804374e54dd1598b81b9fac0eba430
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 link farm, all pointing to websites promising free Robux or game hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to direct users to potentially malicious or scam-related content. The ML classifier also strongly flagged this PDF as malicious.

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-robux-for-free-2021-game-hack
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/free-robux-websites-no-human-verification_GM431946152.pdf
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/hacking-into-someones-roblox-account-2021_GM431946152.pdf
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/roblox-fly-hack-2021-download_GM431946152.pdf
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/hacks-to-get-free-robux_GM431946152.pdf
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/roblox-hotel-elephant-infinite-money-hack_GM431946152.pdf
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-account-script_GM431946152.pdf
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdf
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/cheats-that-make-you-get-staff-on-roblox_GM431946152.pdf
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/thebuxian-you-have-robux-try-hack-today_GM431946152.pdf
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/best-minecraft-hacked-client-2021_GM479516143.pdf
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/robux-hackedus_GM431946152.pdf
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdf
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-on-ipad-2021_GM431946152.pdf
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/roblox-free-robux-free-hack_GM431946152.pdf
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/free-song-codes-for-roblox_GM431946152.pdf
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/free-robux-no-offers_GM431946152.pdf
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/minecraft-fly-hack_GM479516143.pdf
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/free-modded-minecraft-server-hosting_GM479516143.pdf
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/free-roblox-money-com_GM431946152.pdf
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/free-robux-prmo-code_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000336d.bin
cba92213e434316ff6bda7e48660ab6df4129ecedd0144079f4f3210ed71a731		 pdf-font-stream PDF embedded font (sfnt) at offset 0x336D 21916 bytes
font_01_sfnt_off00006406.bin
ed3773dc5b1623baadffd195533fa680f3cbb5a9fb18cecf7df05bde37a7b2a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6406 19192 bytes

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