Malicious PDF — malware analysis report

Static analysis result for SHA-256 18d6858d3229dafd…

MALICIOUS

PDF

36.1 KB Created: 2021-06-19 06:10:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 30313bae7fc7eba69dabbfe7e050c991 SHA-1: 384186ea1c3bb64a27d0fe901526a4dab6b6a9a6 SHA-256: 18d6858d3229dafde99f5432d4456ffdb89475b6d98a340a83358a07ff06a2de
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDFs, suggesting a link farm designed to attract users searching for in-game currency hacks. The presence of a direct URL to a potential download, combined with the ML classifier's high confidence, indicates a malicious intent to trick users into downloading further content. No scripts were extracted from this sample.

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/how-to-get-free-robux-2021-december-game-hack
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-spins_GM406889139.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/how-do-you-get-robux_GM431946152.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/how-you-get-free-robux_GM431946152.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-blogspot_GM406889139.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/roblox-com-hack_GM431946152.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/coin-master-hacks-for-free-spins_GM406889139.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/coin-master-coins-free_GM406889139.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/minecraft-windows-10-free-trial_GM479516143.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/free-spin-link-for-coin-master-game_GM406889139.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-download_GM406889139.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/offers-to-get-free-spins-in-coin-master_GM406889139.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/how-to-duplicate-coin-master-spin-hack_GM406889139.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-2021-download_GM406889139.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/free-spin-coin-master-apk_GM406889139.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/coin-master-unlimited-spin-hack-apk_GM406889139.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/today-free-spin-coin-master_GM406889139.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/haktuts-coin-master-today_GM406889139.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/can-i-get-robux-for-free_GM431946152.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/wurst-client-download_GM479516143.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/coin-master-spin-link-today_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003343.bin
2687cd99d9686c2470945e5fe72c6a6ab10c4ea426f4be911abd9b15331b5fc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3343 22564 bytes
font_01_sfnt_off000065bd.bin
3307829a05253fb866217247c8c611867fba21ab05d5164f8120303c6441f6c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65BD 19812 bytes

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