Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a03db3045a0d99…

MALICIOUS

PDF

33.2 KB Created: 2021-07-03 15:32:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 24478a056504d335d38ad18558108d61 SHA-1: c4476b26c9d7855036f48322078e12d98bd5790a SHA-256: 96a03db3045a0d9965a8944ffee58b2447b4bf1e57389af3fc7e8dfb6d4de140
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a link farm, suggesting it is designed to redirect users to external sites. The primary URL, http://netcdn.tw/app/431946152/robux-games-game-hack, appears to be a lure for game-related cheats or currency. The ML classifier strongly flagged this PDF as malicious, and the presence of many external links indicates a potential attempt to distribute further malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/robux-games-game-hack
    • https://lib.insan-unggul.ac.id/repository/free-robux-picture-verification_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/roblox-noob-shirt-free-shipping_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/comment-hacker-roblox-prison-life_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/free-robux-codes-no-offers_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/daily-coin-master_GM406889139.pdf
    • https://lib.insan-unggul.ac.id/repository/hack-coin-master-apk-download_GM406889139.pdf
    • https://lib.insan-unggul.ac.id/repository/coin-master-free-spin-trick_GM406889139.pdf
    • https://lib.insan-unggul.ac.id/repository/how-t-oget-free-robux_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/minecraft-bedrock-free-download_GM479516143.pdf
    • https://lib.insan-unggul.ac.id/repository/roblox-jailbrike-hack-slurp_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/how-to-hack-roblox-mining-simulator_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/coin-master-free-spins-only_GM406889139.pdf
    • https://lib.insan-unggul.ac.id/repository/roblox-hack-free-robux-2021_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/how-to-get-minecraft-dungeons-for-free_GM479516143.pdf
    • https://lib.insan-unggul.ac.id/repository/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdf
    • https://lib.insan-unggul.ac.id/repository/free-robux-groups-active_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/twitter-coin-master-free-spins-link_GM406889139.pdf
    • https://lib.insan-unggul.ac.id/repository/robux-generator-no-verification-2021_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/hack-coin-master-game-download_GM406889139.pdf
    • https://lib.insan-unggul.ac.id/repository/vide-hacking-for-roblox-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_off00002dc1.bin
30701323611b01ac178d658109b8eb61342c3f3039971afb33161b1bcec53576		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DC1 21576 bytes
font_01_sfnt_off00005d16.bin
1c86891a434958755f469b88f580caf751f6bbfe94bde8f6cf7713f7afa322bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D16 18812 bytes

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