Malicious PDF — malware analysis report

Static analysis result for SHA-256 a905025a68291a4c…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 00:26:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1a6e97216090d786373b313bbea30327 SHA-1: bf141280b2016ab5f8469e7996bf55bbc53ed9c6 SHA-256: a905025a68291a4c5250ca203489a68cc7e48359a20cf989bb305020485e9ce3
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are related to game hacks and cheats, suggesting a lure for users seeking such content. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the ML classifier strongly flagged this PDF as malicious. The presence of a 'download button' heuristic further supports the malicious intent of directing users to external resources.

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/lazyblocks-com-free-robux-game-hack
    • http://perpustakaan.sman2bondowoso.sch.id/repository/minecraft-xray-hack_GM479516143.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/dbz-rage-roblox-cheats-for-ulimited-power_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/how-to-get-free-robux-without-paying_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-free-spins-without-human-verification_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-generator-for-roblox-2021_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-coins-for-flip-master-online_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-coin-master-spins-blog_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/google-how-do-you-get-free-robux_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/roblox-hack-dll_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/get-minecraft-for-free_GM479516143.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/roblox-com-free_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-hack-no-download_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/legit-coin-master-hack-october-2021_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/play-minecraft-free-online-no-download_GM479516143.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/hack-tutorial-xb-roblox_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-no-download_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/roblox-script-hacks_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002eb9.bin
30945372b0a910f71b2d77bcee7d9de2048a38797a65836696da56570185b368		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB9 22464 bytes
font_01_sfnt_off00006105.bin
d59a65bdecbb5c87bb70f1067a6075a20336de1a5b550eccc1c41dc66eb6c340		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6105 19480 bytes

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