Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8f7a481065cbf65…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 02:34:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 85a1e7044c471f6484520e976754457d SHA-1: 30d1afbf39af0714de6f382198fe722e4e9bb5bb SHA-256: b8f7a481065cbf650c3d53d82dad511509ef6b4291db404d6dc19ad194e3e702
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains lures for game hacks and free items, directing users to download content from external URLs. The presence of a password-protected archive lure suggests an attempt to bypass security controls by encrypting the payload. The ML classifier strongly flagged this PDF as malicious, and the document body contains references to 'cmd' and game-related hack scripts, indicating a likely attempt to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/free-minecraft-account-and-password-game-hack
    • http://library.stipjakarta.ac.id/etd/repository/all-roblox-hack-scripts_GM431946152.pdf
    • http://library.stipjakarta.ac.id/etd/repository/hacks-de-levantamiento-de-sables-de-roblox_GM431946152.pdf
    • http://library.stipjakarta.ac.id/etd/repository/roblox-free-ropa_GM431946152.pdf
    • http://library.stipjakarta.ac.id/etd/repository/coin-master-collect-today-free-spin_GM406889139.pdf
    • http://library.stipjakarta.ac.id/etd/repository/claim-robux_GM431946152.pdf
    • http://library.stipjakarta.ac.id/etd/repository/free-spin-coin-master-hacktoman_GM406889139.pdf
    • http://library.stipjakarta.ac.id/etd/repository/robux-promocodes-no-hacking_GM431946152.pdf
    • http://library.stipjakarta.ac.id/etd/repository/robux-free-robux_GM431946152.pdf
    • http://library.stipjakarta.ac.id/etd/repository/free-minecraft-java-server_GM479516143.pdf
    • http://library.stipjakarta.ac.id/etd/repository/robux-quiz-free_GM431946152.pdf
    • http://library.stipjakarta.ac.id/etd/repository/how-to-hack-paintball-on-roblox-with-cheat-engine_GM431946152.pdf
    • http://library.stipjakarta.ac.id/etd/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdf
    • http://library.stipjakarta.ac.id/etd/repository/coin-master-facebook-free-spins_GM406889139.pdf
    • http://library.stipjakarta.ac.id/etd/repository/how-to-hack-a-group-on-roblox-to-own-it_GM431946152.pdf
    • http://library.stipjakarta.ac.id/etd/repository/roblox-script-hack-trading-game-simulator_GM431946152.pdf
    • http://library.stipjakarta.ac.id/etd/repository/roblox-how-to-get-free-pet_GM431946152.pdf
    • http://library.stipjakarta.ac.id/etd/repository/how-to-get-minecraft-coins-for-free_GM479516143.pdf
    • http://library.stipjakarta.ac.id/etd/repository/comandos-cmd-juegos-hack-roblox-2021_GM431946152.pdf
    • http://library.stipjakarta.ac.id/etd/repository/cheat-codes-for-roblox-pet-simulator_GM431946152.pdf
    • http://library.stipjakarta.ac.id/etd/repository/free-printable-minecraft-coloring-pages_GM479516143.pdf
    • http://library.s
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031a7.bin
bc8f3229134c42342f5cbd5a24a78e8b43dc9ad1af16d25f5627249176d2d008		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31A7 21616 bytes
font_01_sfnt_off000060d4.bin
8d601bd979663d62ffb88779dd8f2efa47722c91d2bfec77aeec5bd66bfe1c92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D4 18628 bytes

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