Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa4f9a5753784e1…

MALICIOUS

PDF

29.0 KB Created: 2021-07-06 21:43:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0882c0a838e53f747df630bf06263117 SHA-1: d4552a7253fe35d7d120aaa408d5dcd005b02366 SHA-256: 6fa4f9a5753784e1b15452e8052e3ffa7f6f5db693720ed644075ff54b77b798
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are SEO-optimized and appear to be part of a link farm designed to attract users searching for game cheats and in-game currency. The primary URL http://netcdn.tw/app/479516143/wurst-download-game-hack suggests a download lure. While no scripts were directly extracted, the PDF structure and embedded links strongly indicate a malicious intent to redirect users to potentially harmful content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 3

  • 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.
  • 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.tw/app/479516143/wurst-download-game-hack
    • http://elearning.maassalamiyah.sch.id/__statics/gudangsoal/files/coin-master-free-coins-spins_GM406889139.pdf
    • http://elearning.maassalamiyah.sch.id/__statics/gudangsoal/files/free-spin-link-for-coin-master-game_GM406889139.pdf
    • http://elearning.maassalamiyah.sch.id/__statics/gudangsoal/files/op-rewards-free-robux_GM431946152.pdf
    • http://elearning.maassalamiyah.sch.id/__statics/gudangsoal/files/free-roblox-toy-codes-not-used_GM431946152.pdf
    • http://elearning.maassalamiyah.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://elearning.maassalamiyah.sch.id/__statics/gudangsoal/files/how-many-levels-does-coin-master-have_GM406889139.pdf
    • http://elearning.maassalamiyah.sch.id/__statics/gudangsoal/files/roblox-magnet-simolator-hack_GM431946152.pdf
    • http://elearning.maassalamiyah.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-app-download_GM406889139.pdf
    • http://elearning.maassalamiyah.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verification_GM431946152.pdf
    • http://elearning.maassalamiyah.sch.id/__statics/gudangsoal/files/how-do-you-get-free-food-on-coin-master_GM406889139.pdf
    • http://elearning.maassalamiyah.sch.id/__statics/gudangsoal/files/114-4-hacks_GM479516143.pdf
    • http://elearning.maassalamiyah.sch.id/__statics/gudangsoal/files/coin-master-villages_GM406889139.pdf
    • http://elearning.maassalamiyah.sch.id/__statics/gudangsoal/files/how-to-hack-to-get-robux_GM431946152.pdf
    • http://elearning.maassalamiyah.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-2021_GM431946152.pdf
    • http://elearning.maassalamiyah.sch.id/__statics/gudangsoal/files/roblox-shop-free-stuff_GM431946152.pdf
    • http://elearning.maassalamiyah.sch.id/__statics/gudangsoal/files/coin-master-32-mod-hack-apk-download_GM406889139.pdf
    • http://elearning.maassalamiyah.sch.id/__statics/gudangsoal/files/coin-master-unlimited-spins-apk-free-download_GM406889139.pdf
    • http://elearning.maassalamiyah.sch.id/__statics/gudangsoal/files/coin-master-free-download-app_GM406889139.pdf
    • http://elearning.maassalamiyah.sch.id/__statics/gudangsoal/files/coin-master-hack-mod-apk-free-download_GM406889139.pdf
    • http://elearning.maassalamiyah.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000361f.bin
285665f6b24b28dd313dfd3aa15db53903fd322960dd5597ccbcc9fafbaf3116		 pdf-font-stream PDF embedded font (sfnt) at offset 0x361F 22536 bytes

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