Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bb7a9d9b7668fec…

MALICIOUS

PDF

49.9 KB Created: 2021-06-11 02:25:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 691bb045d193f95d3757b15eb9833849 SHA-1: e19d7451236678594ff0542b6aca2c289dd92af9 SHA-256: 2bb7a9d9b7668fecc19ca9d6acdfee06813950c8d6c60a8e899568f42a336cc6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and heuristics indicating it is malicious. The document body, though heavily obfuscated, suggests a lure related to "Roblox Hack" and includes a primary URL pointing to a potential download. The presence of a "password-protected archive lure" heuristic suggests the downloaded content may be encrypted to evade initial security checks.

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/431946152/2021-roblox-hack-no-adfly-game-hack
    • http://elibrary.perludem.org/repository/discord-server-how-to-hack-a-roblox-account_GM431946152.pdf
    • http://elibrary.perludem.org//repository/how-to-give-robux-on-mobile_GM431946152.pdf
    • http://elibrary.perludem.org//repository/free-back-accessories-roblox_GM431946152.pdf
    • http://elibrary.perludem.org//repository/get-free-cards-coin-master_GM406889139.pdf
    • http://www.elibrary.perludem.org/repository/robux-for-kids_GM431946152.pdf
    • http://www.elibrary.perludem.org/repository/free-robux-for-kids-2021_GM431946152.pdf
    • http://elibrary.perludem.org/repository/roblox-free-exploit-no-virus_GM431946152.pdf
    • http://elibrary.perludem.org/repository/but-link-says-free-robux_GM431946152.pdf
    • http://www.elibrary.perludem.org/repository/free-robux-generator-2021-no-human-verification-and-no-survey_GM431946152.pdf
    • http://www.elibrary.perludem.org/repository/hacker-told-me-how-to-get-free-robux_GM431946152.pdf
    • http://www.elibrary.perludem.org/repository/coin-master-2021-free-spins-link_GM406889139.pdf
    • http://www.elibrary.perludem.org/repository/2021-roblox_GM431946152.pdf
    • http://www.elibrary.perludem.org/repository/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdf
    • http://www.elibrary.perludem.org/repository/how-to-use-speed-hack-cheat-engine-on-roblox_GM431946152.pdf
    • http://www.elibrary.perludem.org/repository/free-robux-codes-2021_GM431946152.pdf
    • http://elibrary.perludem.org/repository/coin-master-2021-free-spins_GM406889139.pdf
    • http://elibrary.perludem.org//repository/how-to-hack-someones-roblox-account_GM431946152.pdf
    • http://www.elibrary.perludem.org/repository/coin-master-hack-android-2021_GM406889139.pdf
    • http://elibrary.perludem.org/repository/haktuts-coin-master-today_GM406889139.pdf
    • http://elibrary.perludem.org//repository/free-roblox-usernames-and-passwords_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052aa.bin
87698716d97e53f33f6daa3489d39cd280583ac6881d701563ecc76e56ef6c8b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52AA 28652 bytes
font_01_sfnt_off000093bf.bin
4c3e2db5174821787a4569c9da4979555510caebd15fb9cea35573c139e242bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93BF 3016 bytes
font_02_sfnt_off00009e22.bin
746b5a2586d5c0426ae31c460352d92fb0f6e2e13ae8eb54ba93d6c0721d94aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E22 18936 bytes

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