Malicious PDF — malware analysis report

Static analysis result for SHA-256 5549f5380c6d4f17…

MALICIOUS

PDF

35.1 KB Created: 2021-06-25 13:00:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 00bd025064fd3a55c1332ac095010240 SHA-1: d079f4e3c6e2e41e9eb816eac0d6aa63ad4d3fea SHA-256: 5549f5380c6d4f17e5d38ad2cfe62bced4096fafa83976526b6f48f2369c0274
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which are presented as download opportunities for game hacks and cheats, such as for Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the presence of numerous links and the document's theme strongly suggest an attempt to trick users into downloading malware.

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-hack-on-computer-game-hack
    • http://perpustakaan.ipts.ac.id/repository/does-roblox-sense-cheat-engine_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/funny-free-roblox-stuff_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/commande-cheat-synapse-roblox_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/free-coins-coin-master-iphone_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/how-to-hack-coins-in-archery-master-3d_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/roblox-system32-host-file-hack_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/coin-master-free-spins-for-iphone_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/free-online-generator-for-coin-master_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/coin-master-free-coins-app_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/hacks-para-roblox_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/coin-master-free-spins-link-hack_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/roblox-how-to-get-free-robux-without-bc_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/coin-master-free-blogspot_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/multiplayer-master-hack-coins_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/robux-app_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/free-robux-on-roblox-app_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030b0.bin
e241f4c468930fc4842215dc8b1086b49ff4d0064af950bd39e8993d8e96337e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30B0 22536 bytes
font_01_sfnt_off0000631b.bin
c2c45a49e07b427b2d15f14d504e7c52e07adfe738af827a79bb1cdf28214c59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x631B 19336 bytes

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