Malicious PDF — malware analysis report

Static analysis result for SHA-256 33a99572b12ec4a8…

MALICIOUS

PDF

33.3 KB Created: 2021-07-05 08:23:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 087715d61218a9002354fa312489c5c9 SHA-1: 030031cb9793e5f0b7a1588e841ac36395b8d83d SHA-256: 33a99572b12ec4a81133d9e67182d64ac025b8ca03e32299b007867f72393783
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to websites offering game hacks and cheats, such as 'robux-website-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. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the embedded URLs and the nature of the content strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/robux-website-game-hack
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/how-to-do-the-walk-through-walls-hack-in-roblox_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/coin-master-game-android-free-download_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/free-roebucks-no-human-verification_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/minecraft-name-tag-hacks_GM479516143.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/how-you-get-free-robux_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/www-roblox-hack-free-robux-deutsch_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/no-human-verification-hack-for-coin-master_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/coin-master-game-hack-online_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/free-coin-master-spins_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/hack-mot-de-passe-roblox_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/free-robux-real_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/free-coins-for-coin-master-blogger_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/how-to-get-free-skins-in-roblox_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/free-online-spins-coin-master_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/coin-master-el-tiger-card-free_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/how-can-you-get-free-robux_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/coin-master-free-spins-link-download_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/roblox-ftw_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/coin-master-game-hack-app_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b5a.bin
3cf48e34e740ee0f2d0254f46dccd8fb98836d33f6c02fda1222afe92cf741d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B5A 22656 bytes
font_01_sfnt_off00005d3e.bin
2be0fca1477d06bba603c393dad1761654b53599fc718925d7eece702ba6c269		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3E 18976 bytes

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