Malicious PDF — malware analysis report

Static analysis result for SHA-256 9886d76f8cb0a42d…

MALICIOUS

PDF

35.7 KB Created: 2021-06-28 18:13:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 41f607da9b57f703c602b7065c403a53 SHA-1: a76e6706987f052153b32498239f1624cc4b30a6 SHA-256: 9886d76f8cb0a42d11d8fca55a1c49bc9977b9c2c5ccfc456eb3bbb8144bdf0d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that lures users with promises of free in-game currency and accounts for popular games like Roblox and Coin Master. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a link farm designed to drive traffic to potentially malicious sites. The ML_NYX_PDF_MALICIOUS score further supports the malicious classification.

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/free-roblox-account-with-robux-2021-game-hack
    • http://www.vista-design.hr/files/2021-free-spins-coin-master-link_GM406889139.pdf
    • https://www.vista-design.hr/files/robux-page_GM431946152.pdf
    • https://www.vista-design.hr/files/gaming-dunia-coin-master-free-spins_GM406889139.pdf
    • https://www.vista-design.hr/files/pubg-uc-200_GM1330123889.pdf
    • http://www.vista-design.hr/files/tiktok-free-100-views_GM835599320.pdf
    • http://www.vista-design.hr/files/secret-skin-combination-get-free-robux_GM431946152.pdf
    • https://www.vista-design.hr/files/how-to-hack-coin-master-using-es-filer_GM406889139.pdf
    • https://www.vista-design.hr/files/coin-master-hack-programers_GM406889139.pdf
    • https://www.vista-design.hr/files/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://www.vista-design.hr/files/best-free-minecraft-server-hosting_GM479516143.pdf
    • http://www.vista-design.hr/files/free-robux-generator-2021-no-human-verification_GM431946152.pdf
    • https://www.vista-design.hr/files/minecraft-free-download-no-virus_GM479516143.pdf
    • http://www.vista-design.hr/files/get-free-robux-no-verification_GM431946152.pdf
    • http://www.vista-design.hr/files/bit-ly-coin-master-hack_GM406889139.pdf
    • https://www.vista-design.hr/files/how-to-hack-somone-roblox-unpachable_GM431946152.pdf
    • http://www.vista-design.hr/files/wurst-client-download_GM479516143.pdf
    • https://www.vista-design.hr/files/is-there-a-way-to-get-free-robux_GM431946152.pdf
    • https://www.vista-design.hr/files/free-coins-coin-master-link_GM406889139.pdf
    • https://www.vista-design.hr/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://www.vista-design.hr/files/roblox-speed-hack-script-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030c6.bin
6f5481a8476c88059ef1bc275191a0f697cb443872f81f6e47a4b1083bc2571e
pdf-font-stream PDF embedded font (sfnt) at offset 0x30C6 22956 bytes
font_01_sfnt_off0000643c.bin
9a38806f3faf3bcb0e3787dea793c548bd2e9f9fa6d32edfefd9e512e126ee87
pdf-font-stream PDF embedded font (sfnt) at offset 0x643C 19780 bytes