Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c5d25ecdb2127c6…

MALICIOUS

PDF

33.3 KB Created: 2021-07-02 06:43:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3e797eef86b307b6a903fa0db401f02d SHA-1: d811f41724e7ca78027db4cbc5bb70014f43bcf1 SHA-256: 6c5d25ecdb2127c6f00baa21ed2c679593a8bc85ddbc697d87deda8527264105
102 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which are presented as 'free game items' or 'hacks' for popular games like Roblox and Minecraft. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users. The ML classifier also flagged this PDF as malicious with high confidence. The primary attack pattern involves luring users to click these links, which likely lead to malicious websites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/how-to-get-free-roblox-cards-no-surveys-game-hack PDF link annotation
    • http://bentoking.co.uk/media/storage/editor/files/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/can-your-roblox-account-get-hacked-by-cookies_GM431946152.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/madcity-roblox-cheat-5m_GM431946152.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/roblox-robloxian-high-school-free-coins_GM431946152.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/how-do-i-get-free-robux-without-installing-apps_GM431946152.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/easypoints-gg-roblox_GM431946152.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/free-printable-coloring-page-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B90 21856 bytes
SHA-256: 090f91c709c910ae71fe33b60513c6afb83ae36b7df80bc9ef1cdc1e700a2098
font_01_sfnt_off00005be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE4 19528 bytes
SHA-256: da1bbccd345a08808e75173a358124e15e854f90e1a8101c8d276d6e9676ef1c

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