Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec33b1a04b01c15…

MALICIOUS

PDF

49.9 KB Created: 2021-06-13 20:17:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6011f7e687e625f6a7e3d3b224976efd SHA-1: eae8c62f535e17875fa3b8a4d335adf7c91c6912 SHA-256: 3ec33b1a04b01c157b6af748a4be9d168dd35872af4c9ff6f1a35bbc71ff54f5
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, that direct users to external websites. The document body and extracted URLs suggest a lure related to game cheats and free items, likely to drive traffic to SEO spam or potentially malicious content. While no scripts were explicitly extracted, the PDF structure and the presence of many external links indicate a malicious intent to redirect users, possibly to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

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/how-too-hack-roblox-calos-amin-house-game-hack
    • http://opac.pps.uin-alauddin.ac.id/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdf
    • http://opac.pps.uin-alauddin.ac.id/repository/how-to-get-free-robux-codes-2021_GM431946152.pdf
    • http://opac.pps.uin-alauddin.ac.id/repository/how-to-get-free-robux-from-slingtv_GM431946152.pdf
    • http://opac.pps.uin-alauddin.ac.id/repository/free-minecraft-packs_GM479516143.pdf
    • http://opac.pps.uin-alauddin.ac.id/repository/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdf
    • http://opac.pps.uin-alauddin.ac.id/repository/coin-master-70-spin-link-2021_GM406889139.pdf
    • http://opac.pps.uin-alauddin.ac.id/repository/get-free-robux-info_GM431946152.pdf
    • http://opac.pps.uin-alauddin.ac.id/repository/op-rewards-robux_GM431946152.pdf
    • http://opac.pps.uin-alauddin.ac.id/repository/how-to-get-free-robux-instantly_GM431946152.pdf
    • http://opac.pps.uin-alauddin.ac.id/repository/coin-master-hack-pro-gamers_GM406889139.pdf
    • http://opac.pps.uin-alauddin.ac.id/repository/free-minecraft-java-edition-codes_GM479516143.pdf
    • http://opac.pps.uin-alauddin.ac.id/repository/coin-master-free-spins-today-daily-links_GM406889139.pdf
    • http://opac.pps.uin-alauddin.ac.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://opac.pps.uin-alauddin.ac.id/repository/free-coin-master-spins-without-human-verification_GM406889139.pdf
    • http://opac.pps.uin-alauddin.ac.id/repository/free-robux-generator-no-verification_GM431946152.pdf
    • http://opac.pps.uin-alauddin.ac.id/repository/free-coins-on-coin-master_GM406889139.pdf
    • http://opac.pps.uin-alauddin.ac.id/repository/free-minecraft-texture-packs_GM479516143.pdf
    • http://opac.pps.uin-alauddin.ac.id/repository/how-to-get-free-robux-without-email_GM431946152.pdf
    • http://opac.pps.uin-alauddin.ac.id/repository/2021-roblox_GM431946152.pdf
    • http://opac.pps.uin-alauddin.ac.id/repository/roblox-hack-no-virus-no-survey_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a52.bin
ee6cc68e7d35525c18173e6afefdfa9879c92b57073c1ac613e7dc36b9cba043		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A52 27432 bytes
font_01_sfnt_off000087d4.bin
77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87D4 2832 bytes
font_02_sfnt_off00009180.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9180 5696 bytes
font_03_sfnt_off00009e92.bin
8b59bae34de13230c2ed88c4fcdb4ea81c910aa43bed262baebda11c9e7bdc85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E92 18868 bytes

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