Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ba039258fd5a13…

MALICIOUS

PDF

33.8 KB Created: 2021-06-19 15:58:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6b8b28f51864cf6a222ffd0fb6ed202c SHA-1: e00055f278ec6b40a02b8ce2889e2e7d898ee482 SHA-256: f8ba039258fd5a13648fa40f578469ee24a81127d86c7ffc3881588664c88a9d
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a document body that advertises hacks and cheats for games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users searching for such exploits. The ML classifier also flagged this PDF as malicious with high confidence.

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.co/app/431946152/roblox-island-royale-hack-aimbot-game-hack
    • http://www.perpustakaan.unda.ac.id/repository/hacker-set-a-pin-on-my-roblox-account_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id//repository/twitter-coin-master-free-spins_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-free-spins-cheat_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-no-sign-up-no-survey_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id//repository/free-robux-not-a-scam_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id//repository/coins-master_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id/repository/doctor-louie-roblox_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-in-app-purchase-hack_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id//repository/how-to-get-free-robux-without-verifying_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id//repository/how-to-get-free-coins-in-minecraft_GM479516143.pdf
    • http://www.perpustakaan.unda.ac.id/repository/how-do-you-get-free-food-on-coin-master_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id//repository/blox-supply-free-robux_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id/repository/roblox-bandit-hack_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-your-roblox-account-hacked_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/how-to-become-a-hacker-in-roblox_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id//repository/boku-no-roblox-hack_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id//repository/roblox-2021-hack_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/minecraft-bedrock-edition-pc-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002df3.bin
5999d71c95ee2ec21bf23e0196815a9c7178e97c648e25cb034e034770b572de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF3 21600 bytes
font_01_sfnt_off00005d8f.bin
497bc9bf9576a31d7eda5cc97319e78bdb021bb21261ba0964c1e598da26c36d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8F 19492 bytes

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