Malicious PDF — malware analysis report

Static analysis result for SHA-256 fada83f239f900fa…

MALICIOUS

PDF

44.1 KB Created: 2021-06-08 12:02:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c95852f657b16c0d4a5556478768723c SHA-1: 2a14b955c5d5f02884b7a61890846ea5a07090c4 SHA-256: fada83f239f900fa959098148b1c5d430718906bf8f62b6d88f5694037b08b09
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, identified as a link farm, that point to external websites offering game-related cheats and currency. The document body, though partially corrupted, contains references to "Roblox Robux Free Robux" and a URL that aligns with the heuristic findings. This suggests the PDF is designed to redirect users to potentially malicious sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/roblox-robux-free-robux-game-hack
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-free-spin-link-new_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-free_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-robux-images_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/robux-hack-free-no-verify_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-hack-2021-apk-download_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/roblox-free-hacks-2021_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-free-spin-bonus_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/can-you-get-robux-for-free_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-free-spin-daily-link_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-free-500-spins-link_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-robux-sites-2021_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/freerobux-hack-us_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-to-get-spins-for-free-on-coin-master_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/ways-to-get-free-robux-2021_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-free-spins-daily_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-spin-app-for-coin-master_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-robux-no-verification_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-robux-easy-and-fast_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/does-coin-master-hack-work_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-to-get-free-skins-in-minecraft_GM479516143.pdf
    • https://collectrobux
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f71.bin
4bcb8660e320e33d4b6c4724cdd199dddae213e1f453e95be236e196c4df2342		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F71 25336 bytes
font_01_sfnt_off00008a6d.bin
25936a5fca383c072af6bc558223e5bb6c069d82cbe0fb4db3bfc75fa2ce3a80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6D 18088 bytes

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