Malicious PDF — malware analysis report

Static analysis result for SHA-256 83d7535c024fb603…

MALICIOUS

PDF

37.5 KB Created: 2021-06-25 18:27:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f8634b20dac5e35f7fbff5181e6fd578 SHA-1: cb10c4fb6567c22db3d8220e32a398dbf0e1b2db SHA-256: 83d7535c024fb603a507aaedba5e401e7d574b0f9fe3bf9d9662f28028ef3255
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which are SEO-optimized and point to game-related hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users with promises of game cheats. The ML classifier also flagged this PDF as malicious with high confidence. The document's purpose appears to be to drive traffic to these external sites, which likely host malicious content or further phishing attempts.

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-mad-city-hacks-2021-game-hack
    • http://elearning.mtsn1kotamagelang.sch.id/__statics/gudangsoal/files/hack-for-roblox-in-jail-break_GM431946152.pdf
    • http://elearning.mtsn1kotamagelang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-ipad-no-password_GM431946152.pdf
    • http://elearning.mtsn1kotamagelang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack_GM431946152.pdf
    • http://elearning.mtsn1kotamagelang.sch.id/__statics/gudangsoal/files/how-to-be-a-inspect-hack-on-mobile-roblox_GM431946152.pdf
    • http://elearning.mtsn1kotamagelang.sch.id/__statics/gudangsoal/files/free-roblox-gun-gsmes_GM431946152.pdf
    • http://elearning.mtsn1kotamagelang.sch.id/__statics/gudangsoal/files/roblox-lab-experiment-hack-script_GM431946152.pdf
    • http://elearning.mtsn1kotamagelang.sch.id/__statics/gudangsoal/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdf
    • http://elearning.mtsn1kotamagelang.sch.id/__statics/gudangsoal/files/how-to-get-a-free-doge-pack-in-roblox_GM431946152.pdf
    • http://elearning.mtsn1kotamagelang.sch.id/__statics/gudangsoal/files/comment-avoir-le-free-skin-de-strucid-roblox_GM431946152.pdf
    • http://elearning.mtsn1kotamagelang.sch.id/__statics/gudangsoal/files/roblox-texting-simulator-money-hack_GM431946152.pdf
    • http://elearning.mtsn1kotamagelang.sch.id/__statics/gudangsoal/files/aimbot-fro-roblox-download-free_GM431946152.pdf
    • http://elearning.mtsn1kotamagelang.sch.id/__statics/gudangsoal/files/roblox-noot-noot-hack-roblox-id_GM431946152.pdf
    • http://elearning.mtsn1kotamagelang.sch.id/__statics/gudangsoal/files/pro-gaming-hacks-com-roblox_GM431946152.pdf
    • http://elearning.mtsn1kotamagelang.sch.id/__statics/gudangsoal/files/minecraft-login-free_GM479516143.pdf
    • http://elearning.mtsn1kotamagelang.sch.id/__statics/gudangsoal/files/free-robux-promo-codes_GM431946152.pdf
    • http://elearning.mtsn1kotamagelang.sch.id/__statics/gudangsoal/files/free-minecraft-java-edition_GM479516143.pdf
    • http://elearning.mtsn1kotamagelang.sch.id/__statics/gudangsoal/files/how-can-i-hack-in-kingdom-life-in-roblox_GM431946152.pdf
    • http://elearning.mtsn1kotamagelang.sch.id/__statics/gudangsoal/files/free-robux-discord_GM431946152.pdf
    • http://elearning.mtsn1kotamagelang.sch.id/__statics/gudangsoal/files/roblox-how-to-free-adidas_GM431946152.pdf
    • http://elearning.mtsn1kotamagelang.sch.id/__statics/gudangsoal/files/how-to-hack-to-get-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003885.bin
a61686817e1331888f02118212f0397a89c3a5d24f0c6175827f054c975fe628		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3885 22648 bytes
font_01_sfnt_off00006b48.bin
08d6ff2230daef4a6cff4ed27ea43092317647ed6fcd7e99e1d2186b91237739		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B48 19832 bytes

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