Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d32f9b7b3d3189c…

MALICIOUS

PDF

34.6 KB Created: 2021-07-01 13:08:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 89509df5fb91bd5fae72d1b73f3407da SHA-1: 3cc908d356a084359372b799cca6db29b6b8b84f SHA-256: 8d32f9b7b3d3189c494137d52aec0d37a67c8f5ef2a379621c0d7ab41bc99075
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO link farms for game-related cheats and hacks. The primary URL, http://netcdn.co/app/431946152/free-robux-codes-and-obc-game-hack, suggests a lure for free Robux, likely leading to a malicious download or phishing page. The presence of a PDF_SEO_LINK_FARM heuristic firing indicates a large number of these deceptive links were generated.

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/free-robux-codes-and-obc-game-hack
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/cool-free-roblox-outfits_GM431946152.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/coin-master-free-coins--spins_GM406889139.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master_GM406889139.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/how-to-hack-a-roblox-account-easy_GM431946152.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/coin-master-no-download-app-but-play-for-free_GM406889139.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/roblox-hack-tool-free-download_GM431946152.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2-5-2021_GM406889139.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/free-robux-sites-2021_GM431946152.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/roblox-booga-booga-admin-script-hack-work_GM431946152.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/coin-master-unlimited-spin-hack-apk_GM406889139.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/robux-prices_GM431946152.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/free-robux-accounts_GM431946152.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/free-robux-hack-2021_GM431946152.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/spin-links-for-coin-master_GM406889139.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/free-robux-com-roblox_GM431946152.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-2021_GM406889139.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/free-robux-microsoft_GM431946152.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/lazy-blocks-com-free-robux_GM431946152.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/roblox-can-you-upload-shirts-for-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003197.bin
975a580dd008be3075569def40cc1ddbc8efda16e822a4823f5daa51542bfb74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3197 22128 bytes
font_01_sfnt_off00006289.bin
b7cd453250a27dda1af9b2248598f79f5697e32dfd3c686ccca5911a3204a81d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6289 18888 bytes

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