Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa80ec55245378d…

MALICIOUS

PDF

34.8 KB Created: 2021-06-28 17:43:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 895fb5896097ad5bd05e2b46d9c960cc SHA-1: c88fbc3ff9d15ea699ad68cef39501dbeb67c264 SHA-256: 4fa80ec55245378d3dff3488b3744b7fcaa0e055b2917d9887b4feb7d636a921
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs that lead to pages offering free Robux or Minecraft hacks, indicative of a phishing or malware distribution lure. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious files. The document's content and embedded links strongly suggest it is part of a phishing campaign or a lure to download further malicious content.

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-robux-in-roblox-easy-2021-game-hack
    • http://digilib-ppsunisma.ac.id/repository/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdf
    • http://digilib-ppsunisma.ac.id/repository/how-to-buy-robux-for-free_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-roblox-gift-cards_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/speed-hack-using-check-cashed-on-roblox_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/roblox-grand-crossing-roleplay-hack-gear_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/promo-codes-to-get-free-robux_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/hacks-para-volar-en-roblox-2021_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/free-robux-websites-that-actually-work_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/minecraft-education-edition-free_GM479516143.pdf
    • http://digilib-ppsunisma.ac.id/repository/free-spins-and-coins-coin-master-2021_GM406889139.pdf
    • http://digilib-ppsunisma.ac.id/repository/robux-matchcomfree-robux_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/coin-master-free-spins-apple_GM406889139.pdf
    • http://digilib-ppsunisma.ac.id/repository/minecraft-bedrock-free-with-java_GM479516143.pdf
    • http://digilib-ppsunisma.ac.id/repository/3-roblox-games-that-give-free-robux_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/caillou-roblox-hack_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/coin-master-game-hack-online_GM406889139.pdf
    • http://digilib-ppsunisma.ac.id/repository/hacking-apps-for-roblox_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/coin-master-free-spins-2021-link_GM406889139.pdf
    • http://digilib-ppsunisma.ac.id/repository/roblox-crashes-when-cheat-engine-open_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/how-to-hack-roblox-with-winrar-on-windows-10_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f7e.bin
57c814bd5dfdc262c915c268f388bd6134712b8fc48590b59fc7e41a6c8ac18c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F7E 22320 bytes
font_01_sfnt_off000060d1.bin
4c88840ca9d5efc344e8082a8d8b383aaeb470f308383b19d2213e054cedcb06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D1 19640 bytes

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