Malicious PDF — malware analysis report

Static analysis result for SHA-256 c61e9bb7756e386a…

MALICIOUS

PDF

42.7 KB Created: 2021-04-28 08:45:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 484fb8a0617c5c9aad3e893245539066 SHA-1: d4cdd35b7940041fc9a58fae19b0bca2035eab8b SHA-256: c61e9bb7756e386ad2294c35d333b9a7c71f20a21ae4e4c82f05b2c96a2b4f50
82 Risk Score

Malware Insights

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

The document employs a browser installation lure, instructing the user to install a fake update or extension to view content, which is a common method for delivering malware. The embedded URLs point to sites offering game hacks, further supporting the social engineering pretext. No scripts were extracted, but the overall structure and heuristics indicate a malicious PDF designed to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/hacks-to-get-free-goodlys-roblox-murder-mystery-2-game-hack
    • https://lib.stie-yai.ac.id/repository/roblox-command-cheats.pdf
    • https://lib.stie-yai.ac.id/repository/robux-hack-no-verification-needed.pdf
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-faces-on-roblox.pdf
    • https://lib.stie-yai.ac.id/repository/gift-card-robux-free-2021-hack.pdf
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-robux-no-builders-club-2021.pdf
    • https://lib.stie-yai.ac.id/repository/free-working-2021-roblox-aim-aimbot.pdf
    • https://lib.stie-yai.ac.id/repository/ash-shirt-kalos-on-roblox-free.pdf
    • https://lib.stie-yai.ac.id/repository/roblox-wall-hack-for-mac.pdf
    • https://lib.stie-yai.ac.id/repository/roblox-hack-download-2021.pdf
    • https://lib.stie-yai.ac.id/repository/free-robux-no-kind-of-surveys.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000045d3.bin
51e4793f3572eff79720147f137e2a0db434854b0cf392e43702574e2678fc49		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45D3 27064 bytes
font_01_sfnt_off0000826c.bin
709fa48aa926e146d4c5a39cf34b9d80e67eb0080bcc1ee9f6ebe213f195ab00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x826C 19264 bytes

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