Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b5dd74f1ec6981e…

MALICIOUS

PDF

34.1 KB Created: 2021-06-27 16:51:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9ebd6731bc4d0387c23d3f39b7c766da SHA-1: db32d3e93b7b99911fdaf6a14245b2b8fe919f6f SHA-256: 7b5dd74f1ec6981e2718a1dc3baa83b0102c73998076eb768204785583e5d8f8
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links and a call-to-action phrase, strongly suggesting a lure to download or visit malicious content. The ML classifier also flagged this PDF with high confidence. The primary IOC is the URL http://netcdn.co/app/431946152/glitch-to-get-free-robux-no-apps-game-hack, which appears to be the intended destination for the user.

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/glitch-to-get-free-robux-no-apps-game-hack
    • http://perpustakaan.ipts.ac.id/repository/daily-free-spins-and-coins-coin-master_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/how-to-get-hacks-on-minecraft_GM479516143.pdf
    • http://perpustakaan.ipts.ac.id/repository/how-to-send-free-spins-on-coin-master_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/what-is-coin-master_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/coin-master-free-spins-link-download-ios_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/free-robux-ad_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/free-spins-coin-master-links_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/free-robux-now-2021_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/roblox-filtering-enabled-weapon-scripts-hacks_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/roblox-superhero-tycoon-free-money-command_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/how-to-get-free-robux-2021-website_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/how-to-hack-coin-master-android_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/boku-no-roblox-hack_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/get-free-spins-on-coin-master_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/computer-hacking-game-roblox_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/free-coin-master-spins-daily_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/roblox-free-robux-no-fike_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/get-free-robux-gg_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/claimrbx-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f9b.bin
a10dc0e7f8b5c42a40562e98a5d1812d6848ecc7a68cfdd6b527d26e83f2c820		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F9B 21712 bytes
font_01_sfnt_off00005f45.bin
b12e1c2f7312af4be206ed7e8a5705722a178e8902aec93a8a0994cf0c714e8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F45 19356 bytes

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