Malicious PDF — malware analysis report

Static analysis result for SHA-256 0917cd988be07a66…

MALICIOUS

PDF

34.2 KB Created: 2021-07-08 06:44:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 09b6b58badebf660dfd259baf6e37746 SHA-1: 78ef24b6f25d61ad4116a467ca7e121f9ae91bbc SHA-256: 0917cd988be07a669ae967214c67054104aac4b10783ae90760e6e9669f2aa3c
102 Risk Score

Malware Insights

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

The PDF document contains numerous links disguised as opportunities to obtain free in-game currency or hacks for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, many of which are likely malicious. The ML classifier also flagged the document as malicious with high confidence. The embedded links likely lead to further malicious content or phishing attempts.

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/431946152/make-free-robux-game-hack
    • https://satuoblong.com/ckfinder/userfiles/files/coin-master-400-spin-link-today_GM406889139.pdf
    • https://satuoblong.com/ckfinder/userfiles/files/minecraft-com-free_GM479516143.pdf
    • https://satuoblong.com/ckfinder/userfiles/files/roblox-exploit-download_GM431946152.pdf
    • https://satuoblong.com/ckfinder/userfiles/files/how-to-hack-into-someones-roblox-account_GM431946152.pdf
    • https://satuoblong.com/ckfinder/userfiles/files/get-free-robux-generator-com_GM431946152.pdf
    • https://satuoblong.com/ckfinder/userfiles/files/coin-master-card-collection-link_GM406889139.pdf
    • https://satuoblong.com/ckfinder/userfiles/files/free-robux-no-human-verification_GM431946152.pdf
    • https://satuoblong.com/ckfinder/userfiles/files/free-robux-codes-generator_GM431946152.pdf
    • https://satuoblong.com/ckfinder/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • https://satuoblong.com/ckfinder/userfiles/files/roblox-cheat-robux_GM431946152.pdf
    • https://satuoblong.com/ckfinder/userfiles/files/robux-sites_GM431946152.pdf
    • https://satuoblong.com/ckfinder/userfiles/files/coin-master-free-spins-promo-code_GM406889139.pdf
    • https://satuoblong.com/ckfinder/userfiles/files/what-do-roblox-points-do_GM431946152.pdf
    • https://satuoblong.com/ckfinder/userfiles/files/coin-master-mod-version-free-download-ios_GM406889139.pdf
    • https://satuoblong.com/ckfinder/userfiles/files/minecraft-build-hacks_GM479516143.pdf
    • https://satuoblong.com/ckfinder/userfiles/files/how-to-get-minecraft-java-free_GM479516143.pdf
    • https://satuoblong.com/ckfinder/userfiles/files/how-can-you-get-robux-on-roblox-for-free_GM431946152.pdf
    • https://satuoblong.com/ckfinder/userfiles/files/how-do-i-get-free-coins-on-coin-master_GM406889139.pdf
    • https://satuoblong.com/ckfinder/userfiles/files/nuvos-hack-de-roblox-6-05-2021_GM431946152.pdf
    • https://satuoblong.com/ckfinder/userfiles/files/infinite-essence-roblox-booga-booga-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e44.bin
895dfbfbcedfb5d07b443909fc2173c5f035679bfd62910afa2b42e1c27cde09
pdf-font-stream PDF embedded font (sfnt) at offset 0x2E44 22484 bytes
font_01_sfnt_off00006080.bin
480c89487a14742f7141225872d5c58d3fe4f75b5aa5747387f60334adf20675
pdf-font-stream PDF embedded font (sfnt) at offset 0x6080 19084 bytes