Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f3a75657bc98ed…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 15:43:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d41c58f3da546d3dbf9a79252c15fc8e SHA-1: 4b8e72afb1612ea324a37969ed28b75ea0ebbcf3 SHA-256: 59f3a75657bc98eda465797b5701a84c04b83e0319a0c83c356dadf384e8050a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains multiple embedded URLs and a primary URL that point to sites offering game-related cheats and free currency, indicating a lure for potentially malicious downloads. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be part of a multi-stage attack where a password-protected archive is intended to bypass initial security scans. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.tw/app/479516143/is-minecraft-bedrock-edition-free-game-hack
    • http://www.library.umbjm.ac.id/repository/free-roblox-toy-codes-2021_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/free-roblox-promo-codes-for-robux_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/coin-master-daily-free-spins-link_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/free-headless-head-roblox_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/free-robux-no-verify-2021_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/roblox-obby-gives-you-free-robux-july-no-password-2021_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-robux-easy_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/free-robux-not-a-scam_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/test-all-free-roblox-gear-free-admin-hacking-scripts_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-youthnow_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-cash_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/free-bling-bling-card-coin-master_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/best-way-to-get-free-robux-2021_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/how-to-make-free-shirts-on-roblox_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/free-spin-in-coin-master_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/free-robux-app_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/roblox-free-robux-november-2021_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdf
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030b0.bin
d84ec8b62fe24b1cbfd7de59db39b88c4600e122bbbb4d529ac8cbf4af074bb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30B0 22492 bytes
font_01_sfnt_off0000622e.bin
8c2aade69ad879b6b8c52caec59c1b00876ea4d1a7a1da7d8dbd37bdf8bae558		 pdf-font-stream PDF embedded font (sfnt) at offset 0x622E 18560 bytes

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