Malicious PDF — malware analysis report

Static analysis result for SHA-256 94c5692d3cf20967…

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 06:27:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f5aefb291d3191a86169eae1f996e3e4 SHA-1: ac17dae7ca4aefc665270c14e8daaca7ee1e16cf SHA-256: 94c5692d3cf20967f678637c02ba3750ac5b8bdf7953941be8ac427b0ac5f986
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a fake CAPTCHA lure to trick users into clicking malicious links. It also exhibits characteristics of a link farm, with numerous URLs pointing to potentially harmful content related to game hacks and free currency. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of a malicious payload or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.online/app/406889139/coin-master-hack-online-pc-game-hack
    • http://elibrary.smknesbu.sch.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-roblox-gift-card_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/haktuts-coin-master-free-spin-today_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-link-2021-april_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/robuxfree-con_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-spin-ml-link_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-spins-for-coin-master-hack_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/tower-of-hell-roblox-hack_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-many-villages-are-in-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-link-without-human-verification_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-clothes_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hack-software_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-link-blogspot_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-websites-that-work_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spin-whatsapp-group_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/legit-coin-master-hack_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/levvvel-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f26.bin
c7956d53baa03a98ff958c6d070f540bd5d94cbf10e815e29ef8fa7bffdb2111		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F26 25832 bytes
font_01_sfnt_off00008b2b.bin
99ef90df2ad25e1ee9ea34b8ec1afd309eb3ac7deee3ba27d18b4527052a99c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2B 17944 bytes

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