Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bf34766656a112e…

MALICIOUS

PDF

30.9 KB Created: 2020-05-17 01:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c100718a214c6ab494bb099da54befd5 SHA-1: e603a2bbfc2cbea17e1447dcf99d30d10a254e9e SHA-256: 3bf34766656a112ed4a616590d3d5efa21af422ae6ce3073ee841e0cd9ca40c2
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links to other PDF files hosted on various domains, a technique often used for SEO link farming or to redirect users to malicious content. The ML classifier strongly indicated maliciousness. The document body contains garbled text but the presence of numerous external links points to a content-delivery or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://sskentertainment.com/uploads/1/3/0/7/130739452/130739452.html#easd+guidelines+gestational+diabetes
    • http://auveratech.net/uploads/1/3/0/9/130969931/kajomezevekiwa-redaladudir-detofotuzipoza.pdf
    • http://phyllisshalant.net/uploads/1/3/0/9/130969710/735d01.pdf
    • http://greendreamzcbdllc.com/uploads/1/3/1/4/131407665/jexuximor.pdf
    • http://knead-a-massage.com/uploads/1/3/1/6/131606408/6f8eab413628e4.pdf
    • http://motorsportsdirt.com/uploads/1/3/1/4/131483598/3730129.pdf
    • http://maisonsdelasagessetraduire.org/uploads/1/3/0/2/130274088/vozuzuragi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004eb4.bin
82768a9380eec70b79095796d6bbdbfcdd788a214826fc8b57e089c8659ed7b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EB4 10012 bytes

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