Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfb10cf80869ceb7…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 07:57:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 845a0726373d92db680ddfe4ad7a7507 SHA-1: 9b695de13bf21b90c11b1eab9a031759488c36af SHA-256: cfb10cf80869ceb7377e19641bba854f18edceccc38a6b83928acc4aef4024cb
82 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a call-to-action phrase, suggesting a lure for users to download content. The primary URL, http://netcdn.tw/app/479516143/how-to-download-minecraft-for-free-on-mac-game-hack, is likely a gateway to a malicious payload. The heuristic for a password-protected archive lure further indicates that the document is designed to bypass security controls by hiding the actual malicious content.

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/how-to-download-minecraft-for-free-on-mac-game-hack
    • http://library.unissula.ac.id/fk/repository/free-robux-without-human-verification-on-ipad_GM431946152.pdf
    • http://library.unissula.ac.id/fk//repository/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdf
    • http://library.unissula.ac.id/fe/repository/free-username-and-password-roblox_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/daily-free-robux_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/roblox-how-to-get-robux-for-free-2021-no-inspect_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/coin-master-500-free-spins_GM406889139.pdf
    • http://library.unissula.ac.id/fk/repository/roblox-free-robux-hack-tool_GM431946152.pdf
    • http://library.unissula.ac.id/fk//repository/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/how-to-get-free-robux-without-surveys_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/http-blackgamesus-coinmasterhack_GM406889139.pdf
    • http://library.unissula.ac.id/fe/repository/free-group-roblox_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/hacks-para-roblox-2021-octubre_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/is-minecraft-java-edition-free_GM479516143.pdf
    • http://library.unissula.ac.id/fe/repository/daily-free-spins-and-coins-coin-master_GM406889139.pdf
    • http://library.unissula.ac.id/fk//repository/android-coin-master-hack_GM406889139.pdf
    • http://library.unissula.ac.id/fe/repository/fast-robux-online_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/grand-theft-auto-roblox-cheats_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/how-to-get-free-robux-for-free_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/how-to-get-minecraft-java-free_GM479516143.pdf
    • http://library.unissula.ac.id/fk//repository/roblox-land-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003397.bin
96de1a182eec0dd7ff1bf28ead633cad1f6e82ea1ff35cedf8821a8d2473abbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3397 22520 bytes
font_01_sfnt_off000065da.bin
3db645ecb8fb9826ba7aaba3d1c82ef7ae8964096d6f8c3c07f5dc50e3a2044e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65DA 18576 bytes

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