Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd936ca90e1e099e…

MALICIOUS

PDF

63.6 KB Created: 2020-03-13 01:38:39 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 06809df81c75b23d4b426cbfaa7cdb93 SHA-1: ff77fe05db894d046fb35848fc042b964768c52f SHA-256: bd936ca90e1e099e843839976bfb1ea272c8e087f8248959caf2405a8b615e0f
92 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, many of which appear to be part of a link farm. The ML_NYX_PDF_MALICIOUS heuristic also strongly indicates malicious intent. The primary attack pattern involves redirecting users to these external sites, which could host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://4pwcrv.bdgct.com/uploads/1/3/0/6/130621601/130621601.html#c
    • http://lifestylewidget.com/uploads/1/3/0/4/130436007/bolevafipenizopigu.pdf
    • http://www.cms.elkethoms.com/uploads/1/3/0/4/130476347/wivegawivotuguk.pdf
    • http://74-123-75-153.mgwnet.com/uploads/1/3/0/6/130639214/d3e509123a.pdf
    • http://www.coloradoprofessionalnetwork.com/uploads/1/3/0/7/130740572/satuga.pdf
    • http://portcharlottehomesforsale.net/uploads/1/3/0/3/130379363/688ee7.pdf
    • http://gulfislandpickers.com/uploads/1/3/0/6/130605351/40fa18.pdf
    • http://longstemteddys.com/uploads/1/3/0/6/130621897/8cc923b60f15e20.pdf
    • http://www.capepostalstory.com/uploads/1/3/0/2/130272403/datepa.pdf
    • http://lloydstreeter.com/uploads/1/3/0/8/130814226/018282f7e68e.pdf
    • http://parentsshopusa.com/uploads/1/3/0/6/130639197/f92c5.pdf
    • http://hiphophopewaco.com/uploads/1/3/0/2/130289235/zotinanivem.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000099a3.bin
2d35dbb84a910c1b6f997f46d0381016e91ed83d5053e8686b17b1c788ed5224		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99A3 2344 bytes
font_01_sfnt_off0000a364.bin
f6c725f6008eff9299cb71042f92f858fe1fd9b39dd3cbc1761cbe50a6080722		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA364 11632 bytes
font_02_sfnt_off0000c906.bin
18f472009c58ae76a8cc3fe6aef841736a0390e428d2d0c2a7e032355909c327		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC906 3192 bytes
font_03_sfnt_off0000d442.bin
650263c41bdfeb56ea4f11f78c6f7c0e6758bf2ee1cdc92376d3325098abd83b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD442 17656 bytes

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