Malicious PDF — malware analysis report

Static analysis result for SHA-256 10de269aeda4f143…

MALICIOUS

PDF

32.5 KB Created: 2021-07-04 09:33:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1570514d99876acbecac8d213645edd4 SHA-1: f9f7dac2300fa24dc561d81e4518393527f924e5 SHA-256: 10de269aeda4f143c989505da6519d1d944e3a3713a439bda68b37ee8cf0c212
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, including a primary URL pointing to a site offering 'instant robux game hack'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users searching for cheats or hacks. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is intended to redirect users to potentially harmful content.

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.tw/app/431946152/instant-robux-game-hack
    • http://www.library.umbjm.ac.id/repository/free-minecraft-bedrock-server-hosting_GM479516143.pdf
    • http://www.library.umbjm.ac.id/repository/pokemon-go-free-team-medallion_GM1094591345.pdf
    • http://www.library.umbjm.ac.id/repository/como-hackear-coin-master-2021-espaol_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/coin-master-connection-lost-hack_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/hackear-coin-master-sin-verificacion_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/free-minecraft-for-kids_GM479516143.pdf
    • http://www.library.umbjm.ac.id/repository/minecraft-hack-client-download_GM479516143.pdf
    • http://www.library.umbjm.ac.id/repository/free-robux-no-anti-bot-verification_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/hacks-tools-para-roblox_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-robux-fast_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/heurne-free-robux_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/roblox-piano-hack_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/coin-master-free-daily-spins_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/hack-coin-master-dzooka_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/roblox-how-to-look-cool-for-free_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/daily-free-spins-coin-master-heaven_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/free-24-7-minecraft-server_GM479516143.pdf
    • http://www.library.umbjm.ac.id/repository/how-to-hack-in-roblox-prison-life_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/spin-links-for-coin-master_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/minecraft-anarchy-server-no-hacks_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c76.bin
604987987ac93db25aa0c0958bacd81d5b4f73c9dee5a58166a0870c02eded80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C76 21340 bytes
font_01_sfnt_off00005aeb.bin
10778cf50566a743b8a9d5c76b238d9a386255a35829eedc12038ddb18342ac9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AEB 18656 bytes

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