Malicious PDF — malware analysis report

Static analysis result for SHA-256 9786aed5fd3b3302…

MALICIOUS

PDF

42.7 KB Created: 2020-06-14 12:54:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 443d21653b7c790c2b5f97f7ac752669 SHA-1: 55f401400830b0cbebfb3748f85a54ff9e3f48b5 SHA-256: 9786aed5fd3b3302eb83772a494938b6da4bd1a6d97fff25c069489f6469c5e5
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files on different domains. The document body text mentions 'Flexibility exercises golf', which appears to be a lure to disguise the true nature of the document. The primary function seems to be acting as a link farm, potentially for SEO manipulation or to distribute further malicious content via the linked PDFs.

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://spinwerk.com/uploads/1/3/0/4/130483537/130483537.html#flexibility+exercises+golf
    • http://twokingsconfections.com/uploads/1/3/0/4/130489342/mifep.pdf
    • http://melrosebootcamp.com/uploads/1/3/0/6/130639706/fuxenozoxatokoru.pdf
    • http://downtownautoservicechemainus.com/uploads/1/3/1/4/131483245/woxadox.pdf
    • http://vintageglampergirls.com/uploads/1/3/1/4/131453405/d53a824a5130.pdf
    • http://cpcontacts.mypennylaneus.com/uploads/1/3/0/7/130775443/20a64.pdf
    • http://carriepolkinsuranceinc.com/uploads/1/3/0/6/130604780/51fecb30a64b919.pdf
    • http://thecalmnesscoach.com/uploads/1/3/0/7/130740522/deteguzevo.pdf
    • http://adsl-65-71-85-37.lawsnakard.com/uploads/1/3/1/4/131454089/donemunozativure.pdf
    • http://pluggednetworks.co/uploads/1/3/1/3/131383777/d6245e09936f92.pdf
    • http://kidslovebiz.com/uploads/1/3/0/8/130874139/xewebines.pdf
    • http://luvgnv.com/uploads/1/3/1/4/131483153/94b042b8c.pdf
    • https://woniwefis.files.wordpress.com/2020/06/benononifimowiresunat.pdf
    • https://zasolifi.files.wordpress.com/2020/06/wafujitabibavijelutojafa.pdf
    • https://jarojadum.files.wordpress.com/2020/06/32702235303.pdf
    • https://ribekewozepu.files.wordpress.com/2020/06/vatuvekekaxan.pdf
    • https://zazigizer.files.wordpress.com/2020/06/fovudukujoruteki.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065ea.bin
281d44b4edea1a711d1e4c06122939e84e9a1fa9b515bb7b450cb66f751bc479		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65EA 10520 bytes
font_01_sfnt_off00008a08.bin
c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A08 16204 bytes

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