Malicious PDF — malware analysis report

Static analysis result for SHA-256 66e81b97a4e30ce5…

MALICIOUS

PDF

47.7 KB Created: 2021-05-11 02:01:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cf62043d62f1d82d558566bdc265b099 SHA-1: a8986b8ea11079f24bccfa1ed240a05f3ac23bc6 SHA-256: 66e81b97a4e30ce5bcf0da086515bf9560a9e309c64760f6f2aff7210d10ae3a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links disguised as resources for obtaining free in-game currency for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a link farm designed to drive traffic to potentially malicious sites. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs likely lead to phishing or malware download pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.xyz/app/431946152/is-free-robux-real-game-hack
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdf
    • http://pustaka.bbppketindan.info/repository/roblox-skin-free_GM431946152.pdf
    • http://pustaka.bbppketindan.info/repository/how-do-u-get-robux_GM431946152.pdf
    • http://pustaka.bbppketindan.info/repository/coin-master-game-hack-link_GM406889139.pdf
    • http://pustaka.bbppketindan.info//repository/how-to-get-free-cards-in-coin-master_GM406889139.pdf
    • http://pustaka.bbppketindan.info/repository/robux-free-c_GM431946152.pdf
    • http://pustaka.bbppketindan.info//repository/free-roblox-generator_GM431946152.pdf
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-robux-without-email_GM431946152.pdf
    • http://pustaka.bbppketindan.info//repository/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdf
    • http://pustaka.bbppketindan.info//repository/how-to-get-free-robux-games_GM431946152.pdf
    • http://pustaka.bbppketindan.info/repository/minecraft-hack-download_GM479516143.pdf
    • http://pustaka.bbppketindan.info//repository/coin-master-support_GM406889139.pdf
    • http://pustaka.bbppketindan.info//repository/how-to-get-free-robux-without-verification_GM431946152.pdf
    • http://pustaka.bbppketindan.info//repository/download-minecraft-java-edition-free_GM479516143.pdf
    • http://pustaka.bbppketindan.info/repository/will-minecraft-dungeons-be-free_GM479516143.pdf
    • http://pustaka.bbppketindan.info//repository/free-spins-and-coins-com_GM406889139.pdf
    • http://pustaka.bbppketindan.info//repository/free-robux-groups-2021_GM431946152.pdf
    • http://pustaka.bbppketindan.info/repository/is-it-possible-to-hack-coin-master_GM406889139.pdf
    • http://pustaka.bbppketindan.info/repository/roblox-avatar-editor-free_GM431946152.pdf
    • http://pustaka.bbppketindan.info//repository/coin-master-spin-link-today-free_GM406889139.pdf
    • https://www.communes.com
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b03.bin
582f1e9c173e605680751f91bf8e448cadce1b261dc39c2614840b29f939bf0b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B03 34720 bytes
font_01_sfnt_off00009853.bin
9bdcdb8e91d3ea0453a36ee7825602dfd4ad5462dbe9555a8ca018b76ca04954		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9853 18316 bytes

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