Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a731e85b0ab0ccb…

MALICIOUS

PDF

35.8 KB Created: 2021-05-23 15:10:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 664f892e24107bdaf62abdd7121a6bcd SHA-1: e88f96c59d9f42f9862dfbd29a2d9120d21b02f8 SHA-256: 4a731e85b0ab0ccb0ac07022af54e8fa5de56a373322a9be7da23e765c166091
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a prominent call-to-action to download a file, masquerading as a free game hack. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' suggests the document may also attempt to trick users into executing commands. The ML classifier strongly indicates maliciousness, supporting the classification as a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/minecraft-java-free-game-hack
    • http://firesafetyservices.biz/images/free-minecraft-capes_GM479516143.pdf
    • http://firesafetyservices.biz/images/coin-master-unlimited-spin-link_GM406889139.pdf
    • http://firesafetyservices.biz/images/coin-master-hack-apk-online_GM406889139.pdf
    • http://firesafetyservices.biz/images/free-coin-master-spin-app_GM406889139.pdf
    • http://firesafetyservices.biz/images/i-want-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003366.bin
715b4332ca9df8c91ce60e93fb2982cb9e989dc88223afc3cb57d8808679bd02		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3366 25052 bytes
font_01_sfnt_off00006bf2.bin
c651dee67b00b36100d0c208f30a7974f38e9c4fefacd489da3c8fda34869f62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF2 17848 bytes

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