Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb0f5dd8ddb87897…

MALICIOUS

PDF

47.7 KB Created: 2021-06-03 10:10:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 95d4498a1f552bc4bf3329f16bf1631b SHA-1: 6b089d4aceb67edd25938d938be0ebe30f7d4466 SHA-256: cb0f5dd8ddb87897e56ade975307d738d929b3ab3081926656c2e899be782620
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are SEO-optimized and point to game-related cheat sites. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest it is designed to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/406889139/coin-master-free-spins-link-2021-no-verification-game-hack
    • http://digilibfisip.unla.ac.id/repository/coin-master-free-download-for-pc_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/www-free-robux_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/coin-master-apk-free-download_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/free-robux-real_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/coin-master-time-speed-hack_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/wurst-download_GM479516143.pdf
    • http://digilibfisip.unla.ac.id/repository/ways-to-get-free-robux_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/free-robux-rewards_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/coin-master-online-hack-no-human-verification_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/how-to-hack-coin-master-spin_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/card-hack-for-coin-master_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/robux-xyz_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/coin-master-free-spins-whatsapp-link_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/free-spin-coin-master-online_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/coin-master-free-spins-promo-code_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/can-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/sites-to-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005190.bin
9c9ca373b80ac9db2fbc16d9ac76e24b91256fe5470ecf690b5bd3e2e05c0d3d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5190 24384 bytes
font_01_sfnt_off00008914.bin
7d3617ecf51e14e6cffc9372c4441988c3b6cb3ea010f7512aee6af842ef388d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8914 4020 bytes
font_02_sfnt_off0000969f.bin
fb80ad8e35183f753bf91a402d0f68d299ceb73e5cb9a5d171aabc3029406e01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x969F 18592 bytes

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