Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ca0a0d31c0c50fc…

MALICIOUS

PDF

48.5 KB Created: 2021-06-09 09:44:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3adc24251d7f2289ef95aac014a55c95 SHA-1: 1d7028ca9affa3f68e3ff84f6c662fe93ee912ca SHA-256: 3ca0a0d31c0c50fcfd56bece906f0276b1b0a8dfa4c42e43500f08a377bfa645
102 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are structured as SEO-friendly slugs, suggesting a link farm or SEO spam campaign. The presence of a 'download button' lure further supports the idea that the document is designed to redirect users to potentially malicious content or downloads. The ML classifier strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/gladiator-now-we-are-free-roblox-song-id-game-hack
    • http://perpus.poltekeskupang.ac.id/repository/ways-to-get-free-robux-2021_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/free-spins-coin-master-no-survey_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/toolbox-for-mcpe_GM479516143.pdf
    • http://perpus.poltekeskupang.ac.id//repository/free-coin-master-coins-and-spins_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id//repository/minecraft-free-version_GM479516143.pdf
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-hack-apk-download_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id//repository/roblox-group-free-robux_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-hack-root_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-hack-mobile_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/how-to-really-hack-coin-master_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdf
    • http://perpus.poltekeskupang.ac.id//repository/download-coin-master-hack-tool-v1-9_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id//repository/rbx-earn_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id//repository/robux-com-free_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/is-minecraft-bedrock-free_GM479516143.pdf
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-hack-app-download-free_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/how-to-play-minecraft-with-friends-for-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005299.bin
0c5924957a6997deae6ec03cfee65a58b5a9f831ee183d493251e411321d2250		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5299 25728 bytes
font_01_sfnt_off00008df1.bin
02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF1 2912 bytes
font_02_sfnt_off000097ee.bin
3fed6a43057942ddb528f1add8103c803424ba9421c2df87fd691f4e0df06844		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97EE 19224 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.