Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c01d2e574489de1…

MALICIOUS

PDF

45.5 KB Created: 2021-05-16 01:03:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ae07b257cd77359558effd2ef93ce307 SHA-1: 61867d3809612718f95676206a4b43fbef6bc6e7 SHA-256: 0c01d2e574489de1d795c1b07867d3ae8744c7fb119d43f0e58d2e3d876c42f6
102 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are disguised as game hacks, with one primary link pointing to a suspicious URL. The ML classifier also flagged this PDF as malicious. The presence of a "download button" heuristic further supports the lure to download a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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 https://netcdn.xyz/app/406889139/hackear-coin-master-sin-root-game-hack
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/www-rbxhut-com_GM431946152.pdf
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-java-minecraft-for-free_GM479516143.pdf
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-hack-cheat-generator-d_GM406889139.pdf
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-pe-hacks-2021_GM479516143.pdf
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-spin-link-today_GM406889139.pdf
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-link_GM406889139.pdf
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/free-spins-coin-master-site-wwwquoracom_GM406889139.pdf
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/ways-to-get-free-robux-2021_GM431946152.pdf
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/lazyblox-com-free-robux_GM431946152.pdf
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/free-links-for-coin-master_GM406889139.pdf
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/real-coin-master-hack-2021_GM406889139.pdf
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/how-do-you-get-free-roblox_GM431946152.pdf
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-fast_GM431946152.pdf
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/rbx-place-free-robux_GM431946152.pdf
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-exchange-40-free-spins_GM406889139.pdf
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/play-games-for-robux_GM431946152.pdf
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-thumbnail-maker-free_GM479516143.pdf
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spin-redeem-code_GM406889139.pdf
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spin-realme-products_GM406889139.pdf
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/free-coins-and-spins-in-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b36.bin
d55ce97ffcd010e09c58f311dd900d7bd64a6c3c152926ff8c106e1f142e6557		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B36 26792 bytes
font_01_sfnt_off0000872d.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x872D 2840 bytes
font_02_sfnt_off000090df.bin
f8689f1783c870fa0771497041e7577d4712db894208691d27bb372dff2a265b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90DF 17716 bytes

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