Malicious PDF — malware analysis report

Static analysis result for SHA-256 67840c4cb4f0ec5e…

MALICIOUS

PDF

37.8 KB Created: 2021-05-25 07:00:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3632e97fc33667104a79134251295185 SHA-1: 863cc482fe35f2ad42c3b023abfdb0d0243ab9f0 SHA-256: 67840c4cb4f0ec5e7643cdb8252cbbdfc0d6dc1e0d468af61c88294a4d14e14f
82 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a browser extension/update installation lure, prompting the user to click a link to download content. The document body and extracted URLs suggest a lure related to obtaining free followers or in-game currency, which is a common social-engineering tactic. The presence of embedded URLs points to the likely download location of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7010

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/835599320/get-tiktok-followers-free-game-hack
    • http://educhina.mn/editor/files/how-to-hack-roblox-for-robux_GM431946152.pdf
    • http://educhina.mn/editor/files/coin-master-2021-free-spins-link_GM406889139.pdf
    • http://educhina.mn/editor/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdf
    • http://educhina.mn/editor/files/coin-master-how-to-get-free-pet-food_GM406889139.pdf
    • http://educhina.mn/editor/files/free-accessories-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003228.bin
2a4668e03fd7809d67a968355b3ae2a5045a3847b83c30427baa756ad72f2bfb		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3228 24288 bytes
font_01_sfnt_off000069eb.bin
02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69EB 2912 bytes
font_02_sfnt_off000073e8.bin
8cacd57cbae25f5163b35c5b464cf1f4e6be88960ce09657a88da3590579257c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E8 17692 bytes

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