Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4e7ffe3ce73f274…

MALICIOUS

PDF

44.2 KB Created: 2021-04-28 17:43:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3557d23ffc0989f1684f5703a658c930 SHA-1: b759400c681b5d1667fe329e69dcb8d32507eb3d SHA-256: e4e7ffe3ce73f274cd51ebdc682fb11dd7bce2ac1c7dd5e0c30a038b5b4ded84
82 Risk Score

Malware Insights

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

This PDF document employs social engineering tactics, specifically a browser installation lure, to trick users into downloading potentially malicious content related to Roblox cheats. The document contains numerous external URLs pointing to suspicious PDF files, suggesting a downloader or redirector pattern. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

Heuristics 4

  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/how-to-fly-with-cheat-engine-on-roblox-game-hack PDF link annotation
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-roblox-promotion.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-cheat-fly-cheat-tab.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-cheats-no-human-verification.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/speed-hack-roblox-2021.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-get-a-free-knife-in-roblox-assassin.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-robux-hack-on-phone-2021.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-become-hacker-in-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-get-free-robux-august.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-accounts-i-hacked.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/robux-cheats-no-human-verification.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000438b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x438B 25056 bytes
SHA-256: ec0c93708e4818e9adb1248d2f1c00f71ca1d0ffbac82be2faf977bdb2f82bef
font_01_sfnt_off00007d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9E 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off00008760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8760 19396 bytes
SHA-256: f6d1ea5ca739a6aedacc2fe4c9d350faf9f0d67c26051fefdeac2af0010c5799

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