Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d9db01d16e483a8…

MALICIOUS

PDF

45.8 KB Created: 2020-03-24 13:55:16 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5fbcff5f7aea7fb3f5194ca0869b450c SHA-1: 1709fb0d00f90c08082c0234ab6745e6bbd2a869 SHA-256: 4d9db01d16e483a85b780ff00cd993bfacfc7a679a7b0daee027be49ce57de6f
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or a distribution mechanism for further malicious content. The document body itself is largely unreadable binary data, but it does contain the title 'Oraciones compuestas subordinadas sustantivas con funcion de complemento directo' and references to wkhtmltopdf, indicating it was likely generated programmatically.

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://stgilespres.com/uploads/1/3/0/4/130483178/130483178.html#oraciones+compuestas+subordinadas+sustantivas+con+funcion+de+complemento+directo
    • http://thepaintability.com/uploads/1/3/0/6/130639114/3921421.pdf
    • http://humblehandstulsa.com/uploads/1/3/0/2/130271139/4429954.pdf
    • http://oxolaxofix.com/uploads/1/3/0/3/130323302/5903393.pdf
    • http://passlibe.com/uploads/1/3/0/6/130621215/4004591.pdf
    • http://dwoslab.com/uploads/1/3/0/6/130639379/1d256d5.pdf
    • http://thehealthyhutshop.com/uploads/1/3/0/8/130874088/kazufegupag-redix-tugobevuno.pdf
    • http://dvsocialactive.com/uploads/1/3/0/5/130544790/5ee92b.pdf
    • http://lakehomemag.com/uploads/1/3/0/7/130774972/f67e64c608cfac3.pdf
    • http://utmostrealestategroup.com/uploads/1/3/0/2/130291658/tudapujiborarupemub.pdf
    • http://northernkettleswoodshop.com/uploads/1/3/0/7/130739520/375d1342a.pdf
    • http://mail.yogaaah.com/uploads/1/3/0/9/130969475/a7b7d09dfb7fcd.pdf
    • http://siebertspiritwear.shop/uploads/1/3/0/5/130588839/de75cfa3101cd88.pdf
    • http://rosebudvault.com/uploads/1/3/0/5/130541065/3441035.pdf
    • http://cpanel.abcrgr.org/uploads/1/3/0/5/130551925/7349183.pdf
    • http://tturbanranch.com/uploads/1/3/0/5/130589032/6844750.pdf
    • http://munotcup.tvschaffhausen.ch/uploads/1/3/0/4/130483603/sixamipurom.pdf
    • http://nestnourish.com/uploads/1/3/0/2/130288455/lejazumapakukamokesa.pdf
    • http://newbeginningsworshipcenterapostolicfaithchurch.com/uploads/1/3/0/5/130588616/tifanutigomev-kevibe-vuzesiledavu.pdf
    • http://manorirako.com/uploads/1/3/0/5/130589334/6725945.pdf
    • http://tenzo.me/uploads/1/3/0/2/130291523/xapasu_bujisafoluta_lasajupufiwuned_wogezifi.pdf
    • http://isletsciencesmockup.com/uploads/1/3/0/7/130775705/gatabemelegabo_pajit_rorizunewofip_nejejuwikudeko.pdf
    • http://mikeshomepage.net/uploads/1/3/0/7/130775698/rurevanik.pdf
    • http://mikeshomepage.net/uploads/1/3/0/7/130775698/rurevanik.p
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fef.bin
dd64d38cd10c7386ad9b439c6b90de4fe6713314e87c781977185ca0480a4101		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEF 8476 bytes
font_01_sfnt_off00009ee6.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EE6 2652 bytes

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