Malicious PDF — malware analysis report

Static analysis result for SHA-256 63c7c8a8dc4dba89…

MALICIOUS

PDF

34.1 KB Created: 2021-07-01 21:28:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7b1150d1d3ed3339fe8fcbe597d9bc09 SHA-1: 9dd08835e58a3613244e1119527824e435cadd0d SHA-256: 63c7c8a8dc4dba8955f561d56a3939842bc275fc6c94a2e77faeef5c2c268c79
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are SEO-optimized to appear as guides for obtaining free in-game currency or items for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to redirect users to potentially harmful sites. The presence of a download button lure further supports this, aiming to trick users into downloading further malware or engaging in fraudulent activities.

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/robux-free-robux-game-hack
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/how-to-get-20210-robux-for-free_GM431946152.pdf
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/free-roblox-boy-hair_GM431946152.pdf
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/village-4-coin-master_GM406889139.pdf
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-hack_GM431946152.pdf
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/www-free-robux_GM431946152.pdf
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-human-verification_GM431946152.pdf
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdf
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdf
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/tiktok-free-song_GM835599320.pdf
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdf
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/free-coin-master-androd-cheats-2021_GM406889139.pdf
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/coin-master-free-spins-cheats_GM406889139.pdf
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/coin-master-fan-page-free-spins_GM406889139.pdf
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/coin-master-hack-that-actually-works_GM406889139.pdf
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/master-8-ball-pool-free-coins_GM406889139.pdf
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/arsenal-hacks-roblox_GM431946152.pdf
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-for-free_GM431946152.pdf
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/oprewards-points-generator_GM431946152.pdf
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdf
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/minecraft-svg-images-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003012.bin
31fe0cd57d80d54ca3a6ec61fefc7bcb7dbbda0385fb0606029dfa771d29d540		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3012 22100 bytes
font_01_sfnt_off00006126.bin
776cb4e5338264d595c967a8fec9379201c9a4b17293b3c44edd5cf6cd499e31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6126 18716 bytes

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