Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9140b8eac68c1f9…

MALICIOUS

PDF

34.1 KB Created: 2021-06-18 05:46:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: da97e4575a198397d8889db7398fcc8d SHA-1: c8541f3c998eafff6e0979049197b512d386bc40 SHA-256: d9140b8eac68c1f98af2d843057c529db5901751d7d6ed863ae214f0a6a24de8
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a document body that promotes free Robux and game hacks, indicating a phishing or scam attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, likely to further scam pages. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.co/app/431946152/free-robux-stream-game-hack
    • https://pasca.unisba.ac.id/elibrary/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/2021-roblox-place-free-bricks_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-april-fools-hack_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-bloxburg-free-money_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-download-minecraft-for-free-on-mac_GM479516143.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-speed-hack-roblox-without-cheat-engine_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-get-followers-on-tiktok-for-free_GM835599320.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/link-coin-master_GM406889139.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/how-too-get-free-stuff-on-roblox-every-day_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/free-robux-no-human-verification-no-survey-2021_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-get-a-free-dominus-in-roblox_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/free-robux-today-dot-com_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/make-robux_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/game-hack-coin-master_GM406889139.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/how-do-you-get-robux_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/minecraft-items_GM479516143.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/free-spin-link-for-coin-master-game_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003097.bin
ab0c57e966b74e5ccd69f34a3c51b11cd42c48c4df7d58f075a3e78fa75081f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3097 21588 bytes
font_01_sfnt_off0000600f.bin
1c6afd9c6a74c9760f64a05e730cb8b9fe2917919de1f03b4396640c76df1420		 pdf-font-stream PDF embedded font (sfnt) at offset 0x600F 19080 bytes

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