Malicious PDF — malware analysis report

Static analysis result for SHA-256 6db55c9a397ecfdb…

MALICIOUS

PDF

36.9 KB Created: 2020-04-30 00:50:52 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 67c3415b0776fb48217c4399980b0d7b SHA-1: 52754d1682261601af6ef8009f4b2633c37f4cba SHA-256: 6db55c9a397ecfdb7fba5c0a3d3d8c34b8125b67e366b676dc234afc93de09cc
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified as a link farm, pointing to various PDF files hosted on different domains. One of these links is to 'http://cr8iveartsphotography.com/uploads/1/3/0/5/130551182/130551182.html#airplay+mirror+android+tv', which suggests a potential lure or redirection mechanism. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 http://cr8iveartsphotography.com/uploads/1/3/0/5/130551182/130551182.html#airplay+mirror+android+tv
    • http://isabella-torres.com/uploads/1/3/0/2/130270808/cedc938.pdf
    • http://kissakirja.fi/uploads/1/3/0/7/130775649/nezapir.pdf
    • http://mtfirepit.com/uploads/1/3/0/6/130604379/ad19912.pdf
    • http://kc4kah.com/uploads/1/3/0/5/130544591/b1355b91e1cb.pdf
    • http://thepathofservice.org/uploads/1/3/0/4/130483978/tuvenanekafobefow.pdf
    • http://repurposeforgood.com/uploads/1/3/0/6/130621185/3453662.pdf
    • http://knapontwerp.com/uploads/1/3/1/8/131872130/karasug.pdf
    • http://westkeegans.com/uploads/1/3/1/4/131482833/mafesetegotise.pdf
    • http://hunter-babies.com/uploads/1/3/1/3/131380606/551715.pdf
    • http://harrowpactproject.com/uploads/1/3/0/3/130313113/a1f94562c1.pdf
    • http://gocarpetpros.com/uploads/1/3/0/9/130969657/1847020.pdf
    • http://luckytakoyaki.com/uploads/1/3/1/4/131453509/berovalalirukipil.pdf
    • http://smithsjoinery.com/uploads/1/3/0/8/130874666/musipakavoku-karokufazil.pdf
    • http://www.typoland.com/http://www.typoland.com/designers/Lukasz_Dziedzic/Copyright
    • http://www.typoland.com/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d38.bin
de6aacb5a55f55b98bf3ae384f96a51051c900e5a59c241f5198d539ce1a3af5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D38 6168 bytes

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