Malicious PDF — malware analysis report

Static analysis result for SHA-256 56dac3e18e91b684…

MALICIOUS

PDF

48.3 KB Created: 2021-05-11 23:32:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f5f4996032be597c40616effc536f89f SHA-1: 17f8c7e7e2171d9a81a66500ec137dc46e9c465d SHA-256: 56dac3e18e91b6845dd524709bc56bb179c9df3b0e9ab88e656232a87a55ec20
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a malicious lure, likely related to 'Robux' scams, by embedding numerous external links. The PDF_SEO_LINK_FARM heuristic indicates a mass of external links, and the presence of a download button lure suggests an attempt to trick users into clicking through to potentially harmful content hosted at URLs like https://netcdn.xyz/app/431946152/easy-robux-today-com-game-hack. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.xyz/app/431946152/easy-robux-today-com-game-hack
    • https://www.stadtbesichtigungen.de/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdf
    • https://www.stadtbesichtigungen.de/images/free-robux-games-that-actually-work-2021_GM431946152.pdf
    • https://www.stadtbesichtigungen.de/images/free-coins-and-spins-coin-master_GM406889139.pdf
    • https://www.stadtbesichtigungen.de/images/do-robux-generators-work_GM431946152.pdf
    • https://www.stadtbesichtigungen.de/images/free-robux-without-human-verification-2021_GM431946152.pdf
    • https://www.stadtbesichtigungen.de/images/old-roblox-accounts-for-free_GM431946152.pdf
    • https://www.stadtbesichtigungen.de/images/roblox-robux-generator-tool_GM431946152.pdf
    • https://www.stadtbesichtigungen.de/images/free-robux-no-human-verify_GM431946152.pdf
    • https://www.stadtbesichtigungen.de/images/free-spins-coins-coin-master_GM406889139.pdf
    • https://www.stadtbesichtigungen.de/images/free-robux-images_GM431946152.pdf
    • https://www.stadtbesichtigungen.de/images/ways-to-get-free-robux_GM431946152.pdf
    • https://www.stadtbesichtigungen.de/images/best-free-minecraft-hacked-client_GM479516143.pdf
    • https://www.stadtbesichtigungen.de/images/coin-master-free-spins-cheat_GM406889139.pdf
    • https://www.stadtbesichtigungen.de/images/hack-the-game-coin-master_GM406889139.pdf
    • https://www.stadtbesichtigungen.de/images/minecraft-switch-free_GM479516143.pdf
    • https://www.stadtbesichtigungen.de/images/free-card-link-coin-master_GM406889139.pdf
    • https://www.stadtbesichtigungen.de/images/how-to-get-free-robux-youtube_GM431946152.pdf
    • https://www.stadtbesichtigungen.de/images/coin-master-hack-2021_GM406889139.pdf
    • https://www.stadtbesichtigungen.de/images/free-robux-rewards_GM431946152.pdf
    • https://www.stadtbesichtigungen.de/images/free-robux-codes-no-human-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004925.bin
3d0f071fbbdaddf0b23102a04098cd669850dfd5c03099eda83b8de9e8724e74
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4925 35660 bytes
font_01_sfnt_off00009972.bin
73d558874ba1f93a48afe8e813aec995f67c91820d85dfc512325dae3e965bb9
pdf-font-stream PDF embedded font (sfnt) at offset 0x9972 18692 bytes