Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbde269ce438d035…

MALICIOUS

PDF

33.3 KB Created: 2021-07-08 22:17:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0da75200b3d466da683f847b5ee64086 SHA-1: 6cd0edec4456792c2873478825cfcd7636c7c9de SHA-256: dbde269ce438d035e804cd6278a8b95ab068cf4e63055de00bd97e10d908deba
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document uses a lure related to free game accounts and hacks to trick users into downloading a payload. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent. The document body contains a primary URL that likely leads to the malicious download, and the heuristic for a password-protected archive suggests a method to bypass security scanning.

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/free-minecraft-accounts-reddit-game-hack PDF link annotation
    • https://elibrary.ikhac.ac.id/repository/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-games-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/piano-hack-roblox-download_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-level-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-free-premium-method-v3rm_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/pokemon-ultra-sun-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-free-downlow_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/tiktok-views-free_GM835599320.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/hack-ro-ghoul-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-hack-mago_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/get-free-followers-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-robux-inspect-element-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-roblox-logins-password_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/are-free-robux-games-real_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3073 21496 bytes
SHA-256: ec261024e3f52f285e3b3ea63afb69a983f38f281f3511a183dc2b24bcd5ef27
font_01_sfnt_off00005f48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F48 18312 bytes
SHA-256: 50d1f005f3bc6c9a70cadb60561a4ebd3838a82c7b608e060fe80223842f44a3

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