Malicious PDF — malware analysis report

Static analysis result for SHA-256 22cba10aa5b68eab…

MALICIOUS

PDF

35.2 KB Created: 2021-06-20 07:46:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d84cffb83383b6928c86f299b3db42d1 SHA-1: ba1940a325dfcfe8d7b5513c33bf067fe23e7897 SHA-256: 22cba10aa5b68eabd50e7980e56657468a0d65e8c6c9c862937a24971af2ad88
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links and a prominent URL in its body, all related to obtaining free items or currency in popular games like Roblox and Coin Master. This suggests a lure for users to click these links, which are likely to lead to phishing sites or malware downloads. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm heuristic further supports its 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.co/app/431946152/how-to-get-free-models-in-roblox-studios-game-hack
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-to-get-roblox-money_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/coin-master-free-spins-cash_GM406889139.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/roblox-com-free-robux_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-to-get-free-robux-on-roblox-2021-working_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/hacked-roblox-accouts-username-and-password_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/coin-master-links-for-today_GM406889139.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/roblox-cheat-robux-deutsch_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-robux-over-1-million_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-to-get-free-roblox-gear_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/robux-hack-me_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-roblox-glitch_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/pokemon-go-free-100-iv_GM1094591345.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-to-get-free-robux-without-surveys_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-robux-no-survey_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/roblox-free-items-glitch_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-to-get-free-minecoins-in-minecraft_GM479516143.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-to-send-free-spins-on-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030ed.bin
1955801c54e110430be1a1543f9a59fb9c6aef2d23ded1faa03013395fbb6b73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30ED 22516 bytes
font_01_sfnt_off0000634a.bin
33502f3f70708e21c5d6b79570dc82a4dd45b523ee7aa862003ab10ad878d12a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x634A 19548 bytes

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