Malicious PDF — malware analysis report

Static analysis result for SHA-256 f427b8269ac90fe4…

MALICIOUS

PDF

37.3 KB Created: 2021-05-22 02:21:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1e2c68d760c3f36ecc71a19d8550bebb SHA-1: 199f6d1cca92c0120f4e711a370b215f9fdaed7f SHA-256: f427b8269ac90fe45e1eb62caa4807050651aeb32bf2dfad40c49fdd8a238851
62 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and references to "free Minecraft servers" and "game hacks", suggesting a lure for users to download further content. The ML classifier strongly flagged this PDF as malicious, and the presence of a "download button" heuristic reinforces the malicious intent. The document likely aims to trick users into clicking links that lead to malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 4

  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/479516143/best-free-minecraft-servers-game-hack
    • http://www.ck-ceramic.com/Public/upload/editorfiles/roblox-admin-hack_GM431946152.pdf
    • http://www.ck-ceramic.com/Public/upload/editorfiles/free-spins-coin-master-ios-links_GM406889139.pdf
    • http://www.ck-ceramic.com/Public/upload/editorfiles/free-robux-mod_GM431946152.pdf
    • http://www.ck-ceramic.com/Public/upload/editorfiles/how-to-get-free-robux-easy-hack_GM431946152.pdf
    • http://www.ck-ceramic.com/Public/upload/editorfiles/how-to-get-free-robux-by-playing-games_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000348c.bin
a326981074d2ee4d0d30531b30e1b3a25394bca30617b0ffaf40f340821aece6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x348C 29400 bytes
font_01_sfnt_off000071c3.bin
c529f757d6b4a4f9c7840ecb5b6035c813da3045ee3b560268268dab20db1aa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71C3 17896 bytes

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