Malicious PDF — malware analysis report

Static analysis result for SHA-256 58dd4e15a1dd6a58…

MALICIOUS

PDF

89.8 KB Created: 2020-04-03 08:30:09 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4fab314fa3cad1bf33e6b3bb9c875d0c SHA-1: 8a55350ab33034de78343df79a4ad96da580449b SHA-256: 58dd4e15a1dd6a588513fbbb14cdc7d7a7542ee08b66dec741992d69a42d0fbf
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files hosted on similar domains. This pattern is indicative of a link farm or SEO spam campaign, designed to drive traffic to specific websites. The document body itself contains text related to accounting in Colombia, likely as a lure to attract users searching for such information. The primary attack pattern observed is the mass distribution of external links, likely to manipulate search engine rankings or to distribute malicious content indirectly.

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://diddittbutton.com/uploads/1/3/0/2/130288379/130288379.html#historia+de+la+contabilidad+publica+en+colombia+resumen
    • http://get-salesforce.com/uploads/1/3/0/6/130639124/refajozovonu_lipologe.pdf
    • http://claremontspeedway.net/uploads/1/3/0/5/130589080/9999166.pdf
    • http://sweetlyavas.com/uploads/1/3/1/4/131406269/sejosebe.pdf
    • http://saveourplanetbio400.com/uploads/1/3/0/5/130543453/2458604.pdf
    • http://rmaconsulting.it/uploads/1/3/1/4/131438202/pewuze-nilunedal-dubotizos-sexikumot.pdf
    • http://joinloveandresistance.com/uploads/1/3/1/1/131164033/fowirujaz.pdf
    • http://pt-stepilotto.com/uploads/1/3/0/9/130969851/wapawu.pdf
    • http://inspiringmummyclub.co.uk/uploads/1/3/0/2/130291365/sifobuluzo.pdf
    • http://saraschwartzgeller.com/uploads/1/3/0/4/130435695/zewasazo.pdf
    • http://lamelbellaevents.com/uploads/1/3/0/2/130272898/lemor.pdf
    • http://cardiffunicricketclub.com/uploads/1/3/0/6/130639263/vowidaxupek.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_off00013632.bin
282423ec070c49a741cd40983e1a61d9dbeeb3c2c1c9f4acdfb7b563d180429c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13632 9796 bytes

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