Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc244ff81d469549…

MALICIOUS

PDF

45.9 KB Created: 2021-06-11 11:50:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8874e776794c9fd0a976d4cfd47bc7b7 SHA-1: a867248b5af56ad1ccb1ccbf4b978cbe122c945f SHA-256: fc244ff81d4695498ba57bcbc8573a1606b0d2677701f63abf37ce7dd5ba5bb9
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links and a 'download button' lure, directing users to websites that promise free in-game currency. The heuristic findings indicate a link farm and a high ML classification score, suggesting a malicious intent to scam users. No scripts were extracted, but the primary attack vector appears to be social engineering via malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/free-robux-codes-april-2021-game-hack
    • https://library.sman1berau.sch.id/repository/how-to-get-free-roblox-money_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/roblox-free-blue-hair_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/free-robux-no-human-verification-2021_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-hack-apk-online_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/instant-free-robux-generator-no-human-verification_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/freerobux-co_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/tiktok-free-followers-without-human-verification_GM835599320.pdf
    • https://library.sman1berau.sch.id/repository/robux-free-gift-card-org-hack_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/rbx-land-free-robux_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-daily-free-spins-link_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/minecraft-bedrock-hacks_GM479516143.pdf
    • https://library.sman1berau.sch.id/repository/blox-supply-free-robux_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/free-robux-on-phone_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/free-coins-coin-master-blog_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/system48-roblox-hack_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-free-download-app_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/robux-fre-codes_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/united-gaming-net-coin-master-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005184.bin
b6d06e8d891d58c6890178772a4aa1bf0f81bf8685fd11a7ae0712c12077db78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5184 26280 bytes
font_01_sfnt_off00008eb0.bin
ae390154fa170bc8e0a53d0409ec86fa71070d78aa85d0e389d51293c23c1740		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB0 18960 bytes

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