Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb6ce34dd7878c8a…

MALICIOUS

PDF

35.3 KB Created: 2021-06-29 10:00:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b5f29ebcef4e713a8ce76f965fa5916e SHA-1: 796bb0832fbf216794ca038af9d0f80e0fefecc3 SHA-256: bb6ce34dd7878c8aa471d7f35c6f65ebf18ba9d638eda4e7aacac024d36a2fb2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which are presented as download opportunities for game-related cheats and hacks. 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. While no scripts were explicitly extracted, the document's structure and content strongly suggest it's a lure for users to click on malicious links.

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/vdeos-de-los-mejores-hackers-que-hackean-cuentas-en-roblox-game-hack
    • https://mbbs.hr/files/haktuts-coin-master-free-spins-2021_GM406889139.pdf
    • http://mbbs.hr/files/coin-master-free-spin-link-today-download_GM406889139.pdf
    • https://mbbs.hr/files/free-robux-hack-com_GM431946152.pdf
    • http://mbbs.hr/files/free-coin-master-spins-links-2021_GM406889139.pdf
    • https://mbbs.hr/files/how-do-you-hack-on-roblox-2021_GM431946152.pdf
    • http://mbbs.hr/files/free-roblox-usernames-and-passwords_GM431946152.pdf
    • https://mbbs.hr/files/free-robux-games-that-work_GM431946152.pdf
    • https://mbbs.hr/files/robux-generator-online-free_GM431946152.pdf
    • https://mbbs.hr/files/minecraft-building-hacks_GM479516143.pdf
    • http://mbbs.hr/files/robux-generator-without-verification_GM431946152.pdf
    • http://mbbs.hr/files/minecraft-free-games-no-download_GM479516143.pdf
    • https://mbbs.hr/files/free-tiktok-likes-quick_GM835599320.pdf
    • https://mbbs.hr/files/how-to-turn-into-super-saiyan-roblox-no-hacks_GM431946152.pdf
    • https://mbbs.hr/files/coin-master-card-hack-2021_GM406889139.pdf
    • https://mbbs.hr/files/free-coins-and-spins-coin-master_GM406889139.pdf
    • http://mbbs.hr/files/coin-master-hacks-for-free-spins_GM406889139.pdf
    • https://mbbs.hr/files/hacks-for-mm2-in-roblox-2021_GM431946152.pdf
    • https://mbbs.hr/files/how-to-get-roebucks-in-roblox_GM431946152.pdf
    • https://mbbs.hr/files/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdf
    • https://mbbs.hr/files/hacks-piano-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e87.bin
5cae9cfde5d7c5426f7f1fe699c996d918fac0779a04cdbf0aea30fca04e64a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x2E87 22900 bytes
font_01_sfnt_off000061f6.bin
157991cf2a49975c12c42ca5b0bd9c17b35eb7f15c240be90d1ed3dc34ec1968
pdf-font-stream PDF embedded font (sfnt) at offset 0x61F6 19920 bytes