Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3fcbff498835ed…

MALICIOUS

PDF

47.3 KB Created: 2021-05-16 03:00:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 970117c70a4673fa05f6bfe2963c6805 SHA-1: d2e992ce62a94a0658a0fdbe2d95efb39a6fbff5 SHA-256: 0d3fcbff498835edf61ef5095d31a381ad805e153233b3cc878343b99817578c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that form a link farm, directing users to sites offering game hacks and free Robux. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a tactic to distribute malicious content or redirect users to phishing sites. The ML classifier also flagged this PDF as malicious with a high score.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.xyz/app/431946152/games-that-give-you-free-robux-game-hack
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-free-spins-hack-ios_GM406889139.pdf
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-hack-app_GM406889139.pdf
    • http://library.stiks-tarakanita.ac.id/repository/robux-gainer_GM431946152.pdf
    • http://library.stiks-tarakanita.ac.id/repository/ultimate-free-spins-coin-master_GM406889139.pdf
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-free-spin-and-coin-links_GM406889139.pdf
    • http://library.stiks-tarakanita.ac.id/repository/master-coin-free-link_GM406889139.pdf
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-hack-ios-no-human-verification_GM406889139.pdf
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdf
    • http://library.stiks-tarakanita.ac.id/repository/free-roblox-groups-with-funds_GM431946152.pdf
    • http://library.stiks-tarakanita.ac.id/repository/get-free-robux-generator_GM431946152.pdf
    • http://library.stiks-tarakanita.ac.id/repository/how-to-setup-a-minecraft-server-for-free_GM479516143.pdf
    • http://library.stiks-tarakanita.ac.id/repository/roblox-no-download-hack_GM431946152.pdf
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-free-cards-2021_GM406889139.pdf
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-unlimited-spins-apk-free-download_GM406889139.pdf
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-free-spins--spins_GM406889139.pdf
    • http://library.stiks-tarakanita.ac.id/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdf
    • http://library.stiks-tarakanita.ac.id/repository/but-link-says-free-robux_GM431946152.pdf
    • http://library.stiks-tarakanita.ac.id/repository/how-to-get-free-robux-com_GM431946152.pdf
    • http://library.stiks-tarakanita.ac.id/repository/how-to-get-free-skins-on-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000492b.bin
1a350c7ffb0e00931894161eedec07d7710ec71726f25a488a37b0bfb659c020		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x492B 26404 bytes
font_01_sfnt_off000086cf.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86CF 5696 bytes
font_02_sfnt_off000093e1.bin
c4d6735542cd49b50f18b2921f89e54fe5d8ee4af3f47c61005942af246faebd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93E1 19168 bytes

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