Malicious PDF — malware analysis report

Static analysis result for SHA-256 7757dec721dd71ea…

MALICIOUS

PDF

34.6 KB Created: 2021-06-19 22:57:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6ae14982fd7e3786f725faa0152424c4 SHA-1: e401b611cabfc159b90efbbb2260aee3752cd374 SHA-256: 7757dec721dd71eaf59d387a52453f23760bfed5d6a55b0a7c8dda6db86e2964
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded URLs, many of which are designed to appear as links to game-related cheats or hacks. The primary URL, http://netcdn.co/app/431946152/free-robux-really-works-2021-game-hack, suggests a lure for obtaining in-game currency. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation or to distribute malware. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of this file.

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/free-robux-really-works-2021-game-hack
    • http://library.yamasi.ac.id//repository/pubg-uc-or-ag_GM1330123889.pdf
    • http://library.yamasi.ac.id/repository/how-to-get-free-spins-on-coin-master-game_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/hack-coin-master-game-apk_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/how-to-speed-hack-with-cheat-engine-on-roblox_GM431946152.pdf
    • http://library.yamasi.ac.id/repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/how-to-download-minecraft-for-free-on-pc_GM479516143.pdf
    • http://library.yamasi.ac.id//repository/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdf
    • http://library.yamasi.ac.id//repository/free-spins-for-coin-master-2021_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/coin-master-free-coins-generator_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/minecraft-for-laptop-free_GM479516143.pdf
    • http://library.yamasi.ac.id//repository/coin-master-free-spins-1-coin-master_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/free-spin-and-coin-blogspot_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/free-spin-coin-master-today_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/roblox-working-hack-dll-for-ccc_GM431946152.pdf
    • http://library.yamasi.ac.id//repository/coin-master-village-3_GM406889139.pdf
    • http://library.yamasi.ac.id//repository/coin-master-card-collection-hack-apk_GM406889139.pdf
    • http://library.yamasi.ac.id//repository/minecraft-java-edition-free-code_GM479516143.pdf
    • http://library.yamasi.ac.id/repository/free-minecraft-server-hosting-24-7_GM479516143.pdf
    • http://library.yamasi.ac.id/repository/coin-master-reward-link-2021_GM406889139.pdf
    • http://library.yamasi.ac.id//repository/roblox-apk-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d60.bin
40a985faf949df072be6e8df9df11e9a075ab68e7ea36d4545e00e1e0775527f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D60 22604 bytes
font_01_sfnt_off00006018.bin
0c2f69a559ad2a3217fd3af1ece6be02272d4ce65ca3940bb8a00052fc8b6b2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6018 19740 bytes

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