Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2f76eca5534f03c…

MALICIOUS

PDF

33.6 KB Created: 2021-07-04 12:26:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d65685b19375540e76fb4ec3d11c1561 SHA-1: fe0413bc558cf5c000cf5d3ab730583f57c58d2b SHA-256: b2f76eca5534f03c724543945928c717785d75fdea40abc752ec4864eb924e5c
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a link farm designed to redirect users to pages offering game hacks and free currency. The document body explicitly mentions 'Robux Hack Tools' and includes a URL pointing to a potential download. The ML classifier and PDF link farm heuristics strongly indicate malicious intent, likely to deliver a secondary payload or phish for credentials.

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.tw/app/431946152/robux-hack-tools-game-hack
    • https://i-tech.ac.id/perpus/repository/roblox-saber-simulator-hack_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/how-to-get-free-robux-legaly-without-paying_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/free-roblox-executor_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/coin-master-free-spins-and-coins_GM406889139.pdf
    • https://i-tech.ac.id/perpus/repository/roblox-fly-hack-script-pastebin_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/how-to-get-roblox-studio-for-free_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/free-galaxy-shirt-in-roblox-free_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/free-roblox-hack-youtube_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/free-gift-code-roblox_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/free-robux-promo-codes-october-2021_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/schoto-roblox-free-shop-hose_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/free-robux-for-watcing_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/free-roblox-weapons_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/robux-hack_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/wall-hack-roblox_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/https-www-roblox-com-robux-free_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/roblox-hack-unlimited-robux-download_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/how-to-get-free-robux_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/win-free-robux-every-minute_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d76.bin
49c00ea4883d7681228493efa90bdcb69abc2c7156b7968a1928cac0b7514d38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D76 22148 bytes
font_01_sfnt_off00005ebe.bin
97734c8ebbf9bdc7b81322975eb62755299ace721750a42e967de7f23eec8635		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBE 18796 bytes

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