Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0a08d362abab49f…

MALICIOUS

PDF

48.6 KB Created: 2021-06-10 11:30:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: da232f3672ab69bf9e6c4377e55ac5a4 SHA-1: 77ae5234439e59da7107e806bd4d41cac4a7d528 SHA-256: b0a08d362abab49fb2ed2be3a6d6b89f42f642e9d2bfb0c70843e7fbd10a15b4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains multiple embedded URLs pointing to sites that likely host malicious payloads, disguised as game hacks or cheats. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may instruct the user to decrypt a password-protected archive, a common tactic to bypass security filters. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.tw/app/431946152/heists-free-roblox-demo-game-hack
    • http://elibrary.smknesbu.sch.id/repository/free-robux-hack-no-survey-no-password-for-real_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/robux-generator-no-verification-needed_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-mod-version-free-download-ios_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/hack-client_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/noclip-hacks-for-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hack-cydia_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spin-and-coin_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/www-hack-clients-robloxde_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/get-free-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hack-ios-no-human-verification_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-roblox-bundles-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/www-roblox-com-free-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/fre-robux-fro-reallllllll_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hack-generator_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-daily-2021_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-roblox-without-downloading-games_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/jailbreak-cheats-roblox-money_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/minecraft-maps-pe-free-download_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-promo-codes_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000509e.bin
2942da83ce8599a25fd31da6e326b73a11121d9753bf1c12fc486b65d17b6c6a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x509E 27096 bytes
font_01_sfnt_off00008dbc.bin
40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBC 3884 bytes
font_02_sfnt_off00009a64.bin
d37f17fdaad0f70bf5eff6fc8c7824905eb7ee85031eb3a3d89ff7b330570641		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A64 18600 bytes

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