Malicious PDF — malware analysis report

Static analysis result for SHA-256 d74d1e811423bfe3…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 00:51:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c36ff94a9c42ead1327454982effe43d SHA-1: 68ece4762a6cfda2bfefa42496be8e2434b02a36 SHA-256: d74d1e811423bfe3d67b842f0340b90bc51c297e1342a633b62e8d81d8801636
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains numerous embedded links to external resources, many of which are presented as hack tools or cheats for games like Coin Master and Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a link farm designed to attract users searching for cheats. The ML classifier also strongly flagged this PDF as malicious. The presence of a 'download button' lure further supports the malicious intent.

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/406889139/coin-master-hack-tool-v1-9-apk-game-hack
    • http://lib.kunci.or.id/repository/minecraft-bedrock-free-with-java_GM479516143.pdf
    • http://lib.kunci.or.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdf
    • http://lib.kunci.or.id/repository/free-minecraft-severs_GM479516143.pdf
    • http://lib.kunci.or.id/repository/free-robux-hacks-no-verification_GM431946152.pdf
    • http://lib.kunci.or.id/repository/free-robux-money-adder-apk-2021_GM431946152.pdf
    • http://lib.kunci.or.id/repository/how-to-get-robux-for-free-hacking_GM431946152.pdf
    • http://lib.kunci.or.id/repository/ultimate-free-spins-coin-master_GM406889139.pdf
    • http://lib.kunci.or.id/repository/roblox-admin-hack-script-2021_GM431946152.pdf
    • http://lib.kunci.or.id/repository/earn-free-spins-in-coin-master_GM406889139.pdf
    • http://lib.kunci.or.id/repository/hack-coin-master-no-verification_GM406889139.pdf
    • http://lib.kunci.or.id/repository/is-it-possible-to-get-free-robux_GM431946152.pdf
    • http://lib.kunci.or.id/repository/new-roblox-hack-zombie-rush_GM431946152.pdf
    • http://lib.kunci.or.id/repository/minecraft-coins-free_GM479516143.pdf
    • http://lib.kunci.or.id/repository/roblox-cheats-november-2021-dll_GM431946152.pdf
    • http://lib.kunci.or.id/repository/new-roblox-exploit-hack-proxo_GM431946152.pdf
    • http://lib.kunci.or.id/repository/free-robux-games-that-actually-work-2021_GM431946152.pdf
    • http://lib.kunci.or.id/repository/free-robux-generator-2_GM431946152.pdf
    • http://lib.kunci.or.id/repository/how-do-u-get-free-robux_GM431946152.pdf
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-easy-2021-without-human-verification_GM431946152.pdf
    • http://lib.kunci.or.id/repository/free-roblox-wallpaper_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f16.bin
3bceb4f3c157787068a2e8033cb2f9ff3a9839c45c0fefb62250b2cb62dc499f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F16 22760 bytes
font_01_sfnt_off0000620b.bin
56303692e1f284d5036f2cf72873b43e2bb0894e04ed6b7a74506240a39f7b95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x620B 18660 bytes

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