Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd4645dd7f8c1aa…

MALICIOUS

PDF

40.3 KB Created: 2021-05-01 04:45:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: daee068c7dfb5e94d958a46a576db892 SHA-1: e923a944eb08203f3aa05232cf20c88d49293f04 SHA-256: abd4645dd7f8c1aa5cb29f201aa96cae32587ad35ff9503fa97b680aa7ee531a
90 Risk Score

Malware Insights

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

The PDF file was flagged by an ML classifier as malicious. It contains heuristics indicating it's a lure for installing browser extensions or updates, and presents a fake download button. The document body, though heavily obfuscated, contains a URL pointing to what appears to be a 'Roblox hack', suggesting a social engineering attack to trick users into downloading malware. No scripts were extracted, but the presence of an external URI and the ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 5

  • 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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/roblox-pastebin-hack-game-hack
    • https://lib.stie-yai.ac.id/repository/how-to-create-a-roblox-group-for-free.pdf
    • https://lib.stie-yai.ac.id/repository/hack-robux-real.pdf
    • https://lib.stie-yai.ac.id/repository/hack-app-for-roblox-pet-simulator.pdf
    • https://lib.stie-yai.ac.id/repository/how-to-hack-in-roblox-2021-may-19.pdf
    • https://lib.stie-yai.ac.id/repository/give-free-robux.pdf
    • https://lib.stie-yai.ac.id/repository/naruto-new-generations-roblox-hack.pdf
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-robux-without-doing-human-verification.pdf
    • https://lib.stie-yai.ac.id/repository/roblox-account-hacker-online.pdf
    • https://lib.stie-yai.ac.id/repository/hack-roblox-robux-and-tix.pdf
    • https://lib.stie-yai.ac.id/repository/como-hackear-cuentas-de-roblox-100-real.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000404f.bin
1a7098bcbb0f543dc0f6135fffa549decd5141fcd4ea570dc0dd33cf12434411		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x404F 25188 bytes
font_01_sfnt_off00007ae2.bin
65ec6226fcfcaa3e4d31a4b34a92f9649223cb150757b9b4f32e45bec14134db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE2 18560 bytes

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