Malicious PDF — malware analysis report

Static analysis result for SHA-256 967cf8c51ea1919a…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 21:46:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bf5f7871f78a06a7ddfd6831577ad33d SHA-1: c9a0b356e39d26d3d35289aec557b31d69240c05 SHA-256: 967cf8c51ea1919a18b4d8403bbc9634a67181ca866eb6f7dcd5233be69025fb
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded links and a document body that promotes free Minecraft hacked clients and Robux generators, indicating a lure for potentially malicious downloads. The heuristic 'PDF_SEO_LINK_FARM' further suggests a large number of external links, likely for SEO manipulation or distributing malware. While no scripts were directly extracted, the presence of external URIs and the overall structure strongly suggest a malicious intent to redirect users to harmful content.

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/479516143/best-free-minecraft-hacked-client-game-hack PDF link annotation
    • http://library.acehresearch.org/repository/ways-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/www-mistplay-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/https-wwwrobloxcom-games-202120217-sponsoredfreerobux2021-about_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-free-wings_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-pets-on-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/downlode-a-roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/hacks-de-roblox-sin-virus_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/hacking-roblox-zombie_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/robux-hack-png_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-attack-block-hack_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/www-cheatsk-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/list-of-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-exoliner-free_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-inspect-element-free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-no-servery_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3469 22012 bytes
SHA-256: 9e8a493ae28706740a5247aacc89c13410342f859687211bd30c26b683bb5e78
font_01_sfnt_off00006505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6505 18492 bytes
SHA-256: de6dea86fd6d9d2ae37ee86cd92174b2735422e57a595b8bae0417e8dfd3f9d4

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