Malicious PDF — malware analysis report

Static analysis result for SHA-256 46300c629312f04d…

MALICIOUS

PDF

37.6 KB Created: 2021-05-20 23:19:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e4ec49cd00d099f028d2c7aa669873f8 SHA-1: 01a91be8fe5ce65d42d1ae09feb165768f7f181b SHA-256: 46300c629312f04d7342db4122edd736f1a2190d25d7d2f98161bb8243de9b37
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.003 Windows Command Shell T1204.002 Malicious File

The PDF document contains embedded URLs and lures the user with a fake download button, suggesting an attempt to trick the user into downloading a malicious file. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document instructs the user to execute commands via the clipboard, likely to run a downloaded payload. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 4

  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/download-minecraft-free-hiapphere-game-hack PDF link annotation
    • http://krumerhaus.at/images/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://krumerhaus.at/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/tiktok-free-view-10_GM835599320.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3665 26932 bytes
SHA-256: 71bc08346bf00b7dacc6cc739f8c57a7d7f67277cdbb88d31892c57107ee3574
font_01_sfnt_off000070ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70EF 18632 bytes
SHA-256: d5148a3ebf6685d38fa7a82d6609f6f0baf7c57c3f299eff6d795086d297ed64

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