Malicious PDF — malware analysis report

Static analysis result for SHA-256 3db56388eb5d90b3…

MALICIOUS

PDF

44.9 KB Created: 2021-06-03 13:51:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c826d3074d693d7a4d95777ede75e884 SHA-1: edf1b2ade0c8f680f6660873b549a7220bdbfc02 SHA-256: 3db56388eb5d90b3912a4047924a8125d5a91dd204685f6a479406aa86be54bd
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links and a call-to-action phrase, directing users to websites that promise free in-game currency or cheats. The ML classifier and PDF link farm heuristics strongly indicate malicious intent, likely to trick users into visiting scam sites or potentially downloading further malware. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/431946152/earn-robux-com-game-hack
    • https://digilib.stieama.ac.id/repository/codes-to-get-free-robux_GM431946152.pdf
    • https://digilib.stieama.ac.id/repository/roblox-premium-free_GM431946152.pdf
    • https://digilib.stieama.ac.id/repository/can-pokemon-go-free-incense_GM1094591345.pdf
    • https://digilib.stieama.ac.id/repository/minecraft-xbox-360-free-download-code_GM479516143.pdf
    • https://digilib.stieama.ac.id/repository/coin-master-free-spin-and-coin_GM406889139.pdf
    • https://digilib.stieama.ac.id/repository/free-spins-and-coins-coin-master_GM406889139.pdf
    • https://digilib.stieama.ac.id/repository/free-robux-apps-that-work_GM431946152.pdf
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-fb-champion_GM406889139.pdf
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-link-31-march-2021_GM406889139.pdf
    • https://digilib.stieama.ac.id/repository/pig-master-coin-master-free-spin_GM406889139.pdf
    • https://digilib.stieama.ac.id/repository/roblox-hacking-website_GM431946152.pdf
    • https://digilib.stieama.ac.id/repository/best-way-to-get-free-robux_GM431946152.pdf
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-link-2021-no-verification_GM406889139.pdf
    • https://digilib.stieama.ac.id/repository/androeed-ru-minecraft_GM479516143.pdf
    • https://digilib.stieama.ac.id/repository/free-spin-coin-master-game_GM406889139.pdf
    • https://digilib.stieama.ac.id/repository/robux-hacks-2021_GM431946152.pdf
    • https://digilib.stieama.ac.id/repository/robux-free-2021_GM431946152.pdf
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-on-computer_GM431946152.pdf
    • https://digilib.stieama.ac.id/repository/hacks-for-minecraft-bedrock_GM479516143.pdf
    • https://digilib.stieama.ac.id/repository/minecraft-bedrock-edition-pc-download-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_off000051f0.bin
48c55fc43566831b416d1cd8040e293989f0ec8cf4cb381822b429386bd24561		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51F0 25400 bytes
font_01_sfnt_off00008cdf.bin
73022d66eecee4efafff23453c98f7b2dd1a6a21145ea515066a8a3f3a15b160		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDF 18340 bytes

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