Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fdf1decdaf831d3…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 00:45:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a650174295650ebe181c92a5b17ec7a2 SHA-1: ee07b341e02c9643af4e91fb97e47f6688a12204 SHA-256: 3fdf1decdaf831d3928831ee618917f08bd6030d02537c94f9ea3266ac7c6538
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of SEO-optimized links pointing to other PDF files, many of which are hosted on the same domain and relate to game hacks and cheats. This indicates a link farm designed to attract users searching for such content. The presence of a 'download button' heuristic further suggests a lure to download potentially malicious files. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a malicious distribution scheme.

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/atticus129-roblox-hacked-image-game-hack
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-hack-codes_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-wall-hacks-for-mac_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-become-a-roblox-hacker-free-on-pc_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/pubg-600-uc-redeem-code_GM1330123889.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-hack-any-roblox-account-2021_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-get-free-robux-in-roblox-2021-easy_GM431946152.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/free-tiktok-followers-no-downloads_GM835599320.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/is-there-a-way-to-get-free-robux_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/all-roblox-bloxburg-hack-2021_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/cheat-engine-roblox-lumber-tycoon-2-money_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/coin-master-hack-apk-latest-version-2021_GM406889139.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/free-robux-co_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-game-studio-unblocked-cheats-download-guide-unofficial-chala-dar_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/pubg-uc-zong_GM1330123889.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-free-stone-shirt_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/free-robux-giver-online_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/cheat-engine-tokyo-ghoul-roblox_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-get-free-robux-for-kids_GM431946152.pdf
    • https://pasca.unisba.ac.id/elibrary/repository/how-do-i-get-free-robux-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f96.bin
8eeb9fb9fec34d3a3b0aed2a1f5ee4b958c20789ee745a60ac72eaa6fe01d150		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F96 22360 bytes
font_01_sfnt_off00006121.bin
306015ff50a8da4cc2017b42df23cd4a454358ae8d8b1cd3ab6b2373812ec57a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6121 19660 bytes

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