Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a0ee94df2951e92…

MALICIOUS

PDF

35.8 KB Created: 2021-07-03 11:51:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 31702cee336e30c61d50d5af90d116d2 SHA-1: f787b16fbf21ab76f884974f10195957679be093 SHA-256: 3a0ee94df2951e929ec53df124cd2f183ef09541625beacd7eacf6290a06b3fb
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that are part of a link farm, all related to Roblox game hacks and free Robux. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and 'ML_NYX_PDF_MALICIOUS' strongly suggests malicious intent. The document body, though partially corrupted, contains references to these URLs and a call-to-action phrase, indicating a lure to download or visit malicious content. While no scripts were explicitly extracted, the structure and embedded URLs point to a phishing or malware distribution attempt.

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/roblox-hack-game-hack
    • http://digilibfisip.uwks.ac.id/repository/robux-hack-2021_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/free-robux-codes-never-used_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/free-robux-secret-video-to-get-free-robux_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/itos-fun-roblox-free-robux_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/how-to-install-hacks-to-roblox_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/free-games-to-play-like-roblox_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/free-robux-without-human-verification-2021_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/free-robux-username-and-password_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/free-roblox-gift-card-code-generator-2021_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/rocashcom-earn-free-robux-by-watching-videos-and-completing-sur_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/free-robux-khaos_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/admin-free-roblox_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/free-robux-inspect-element-2021_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/all-players-in-roblox-passwords-password-hack_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/roblox-cheat-engine-download-2021_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/free-robux-wotking_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/roblox-anomaly-breach-items-cheats_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/como-usar-cheat-engine-no-roblox-2021_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/free-robux-star-codes_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/is-hacking-roblox-a-crime_GM431946152.pdf
    • https://www.roblox.com/my/tasks
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032e8.bin
d45d0df50ecc6dd38fa1428c53b6e47f60162d5b43fe615c9f4811e65d7f3858		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32E8 23504 bytes
font_01_sfnt_off000067f2.bin
999563e5ceb90bacb24403d8989521a1fbef177d0399db3bbb86b28fcd553b17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67F2 18656 bytes

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