Malicious PDF — malware analysis report

Static analysis result for SHA-256 3025a86b1e93e41c…

MALICIOUS

PDF

33.4 KB Created: 2021-07-06 06:41:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c1cba32b305f98d1b34ace380716da9c SHA-1: 82713afda328d55e0982451a870d0abf3f10f32d SHA-256: 3025a86b1e93e41caccdfcb19b502fe65cd7487dcbcbac4991ae0842b60a0586
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are designed to appear as "free game hacks" or "free currency" lures. The heuristic PDF_SEO_LINK_FARM indicates a large number of these links, suggesting a link farm intended to drive traffic to potentially malicious sites. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the document, likely serving as a lure for phishing or malware downloads.

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/835599320/login-to-tiktok-free-game-hack
    • http://www.vista-design.hr/files/get-free-robux-roblox-games_GM431946152.pdf
    • http://www.vista-design.hr/files/dodgeball-roblox-hack_GM431946152.pdf
    • http://www.vista-design.hr/files/coin-master-hack-version-ios_GM406889139.pdf
    • https://www.vista-design.hr/files/how-do-you-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://www.vista-design.hr/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdf
    • https://www.vista-design.hr/files/free-games-like-roblox_GM431946152.pdf
    • http://www.vista-design.hr/files/free-robux-no-apps_GM431946152.pdf
    • https://www.vista-design.hr/files/como-consegir-robux-gratis-sin-hack_GM431946152.pdf
    • http://www.vista-design.hr/files/how-to-get-free-robux-by-playing-games_GM431946152.pdf
    • https://www.vista-design.hr/files/free-robux-no-verification-no-survey-2021_GM431946152.pdf
    • https://www.vista-design.hr/files/free-robux-gift-card-codes_GM431946152.pdf
    • http://www.vista-design.hr/files/free-roblox-outfits_GM431946152.pdf
    • https://www.vista-design.hr/files/play-minecraft-online-free_GM479516143.pdf
    • https://www.vista-design.hr/files/wheel-decide-roblox-free-robux_GM431946152.pdf
    • https://www.vista-design.hr/files/how-to-hack-admin-roblox_GM431946152.pdf
    • http://www.vista-design.hr/files/coin-master-free-spin-and-coin-link-today_GM406889139.pdf
    • https://www.vista-design.hr/files/tiktok-fans-free_GM835599320.pdf
    • http://www.vista-design.hr/files/minecraft-bedrock-server-hosting-free_GM479516143.pdf
    • https://www.vista-design.hr/files/how-to-hightspeed-roblox-with-cheat-engine_GM431946152.pdf
    • https://www.vista-design.hr/files/how-to-hack-roblox-without-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e5c.bin
521e08ae940b37951c5020f035cdd7ed1bf586fcdda64f02b8c3a676dd5cfe39
pdf-font-stream PDF embedded font (sfnt) at offset 0x2E5C 22576 bytes
font_01_sfnt_off00006090.bin
e46ed27892c32a85f9487b563aee598bdbeef272b8ff4bef3dd5e919e2f7784d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6090 17972 bytes