Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9792cae60184307…

MALICIOUS

PDF

38.6 KB Created: 2020-03-29 01:46:30 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 619b6cfd0d2433ec9fa55b3252b8841a SHA-1: 3676a12399b7995aa7cbc3f90d7c8ac1c05cab46 SHA-256: c9792cae6018430704f85f6aa5852a8f4c0df606f14f573dd6b6db872df7ab23
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are hosted on domains that appear to be part of a link farm. The document body text, though partially corrupted, includes the phrase 'Cuales son las caracteristicas de un angulo obtuso' and references 'wkhtmltopdf', suggesting a lure to a page discussing geometry. The primary heuristic indicates this is a 'PDF SEO LINK FARM' designed to drive traffic to numerous external PDF files, likely for SEO manipulation or to host malicious content. No scripts were extracted, limiting the analysis of direct payload delivery.

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://74-123-75-132.mgwnet.com/uploads/1/3/0/7/130776847/130776847.html#cuales+son+las+caracter%C3%ADsticas+de+un+%C3%A1ngulo+obtuso
    • http://pamelagamesby.com/uploads/1/3/0/5/130539599/6460590.pdf
    • http://www.madbluesailing.com/uploads/1/3/0/5/130539990/7942205.pdf
    • http://purrfectpurr.com/uploads/1/3/0/5/130588790/5281308.pdf
    • http://jennifermcdermottphotographer.com/uploads/1/3/0/6/130640214/4bb6a56bd058c2c.pdf
    • http://lightningsoccerclub.org/uploads/1/3/0/4/130436337/topew.pdf
    • http://www.thelinenlady.net/uploads/1/3/0/9/130969004/zipakizipokexaj.pdf
    • http://dhaneshwara.com/uploads/1/3/1/0/131071145/lojulajedilogusexisu.pdf
    • http://bedbugheatohio.com/uploads/1/3/0/3/130379357/silus.pdf
    • http://baileesbest.com/uploads/1/3/0/6/130604411/139212.pdf
    • http://comedianambrosejones.net/uploads/1/3/0/4/130435734/34516a7b.pdf
    • http://amazinglybrave.com/uploads/1/3/0/5/130544702/31c94e24.pdf
    • http://ckstromer.com/uploads/1/3/0/5/130547552/39e208c.pdf
    • http://mta-sts.houhaswissies.com/uploads/1/3/0/9/130969790/sixesigezijo_peripipas_tadomitamatofa_nawokelejorukoj.pdf
    • http://my-lakeview.com/uploads/1/3/0/2/130271148/vikarenopisupi.pdf
    • http://alexandermgmtnyc.com/uploads/1/3/0/6/130620657/kuwiro.pdf
    • http://ns1.stoughtonbands.org/uploads/1/3/0/8/130813898/vukugez.pdf
    • http://www.hashtagmomblog.com/uploads/1/3/0/4/130493037/kebimemenuxa.pdf
    • http://augustmaverick.com/uploads/1/3/0/5/130540104/vupusumedotese.pdf
    • http://mail.vacb.org/uploads/1/3/0/3/130379769/ruzegogoxivunesa.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_off00006d8e.bin
8c0bac9679442a9aceb391e7ccd34907653aa85041efbdab3287bee164a2738c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8E 7816 bytes

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