Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22d90a49f51d56f…

MALICIOUS

PDF

34.6 KB Created: 2021-06-25 23:02:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ce3b12840ca8e9339351bfd5a340e5ee SHA-1: d6c612e677adba859be3090d0238eb12258587e0 SHA-256: a22d90a49f51d56fb0b1b57405d7b91d62220af44b9ebf30ff80fd0848999c93
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure for free Roblox items, directing users to download a file from a suspicious URL. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button and password-protected archive lure further indicate a malicious workflow. The primary IOC is the external URL used to distribute the payload.

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.co/app/431946152/free-dominus-hat-roblox-game-hack
    • http://digilib.pustaka.unand.ac.id/repository/how-to-get-free-knives-in-roblox-murder-mystery-2_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/free-robux-hack-no-survey-2021_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/free-robux-for-surveys_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/free-robux-codes-no-verification_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/coin-master-free-spin-codes_GM406889139.pdf
    • http://digilib.pustaka.unand.ac.id/repository/best-free-rp-games-on-roblox_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/free-robux-mod-apk_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/how-to-get-free-robux-with-a-code_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/best-minecraft-hacked-client_GM479516143.pdf
    • http://digilib.pustaka.unand.ac.id/repository/infection-inc-roblox-hack_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/roblox-bloxburg-free-play_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/minecraft-java-edition-free-download_GM479516143.pdf
    • http://digilib.pustaka.unand.ac.id/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdf
    • http://digilib.pustaka.unand.ac.id/repository/how-to-hack-roblox-kazok_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/roblox-mega-vip-hack_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/cheat-engine-hack-roblox-jailbreak_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/roblox-email-and-password-hack_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/free-rare-hats-roblox_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/robux-all-codes-free-2021_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/roblox-how-to-get-free-gamepasses-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f7c.bin
bb61020a8f6921b255dd17df8d210801c354f17e097123efee07d6dbcbb4859a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F7C 22340 bytes
font_01_sfnt_off0000611b.bin
3dfb591c911c438abf83739f4b067081b969d54495c2eb20b4f21adf4a30be4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x611B 19440 bytes

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