Malicious PDF — malware analysis report

Static analysis result for SHA-256 4279c5839c5e783a…

MALICIOUS

PDF

39.2 KB Created: 2020-03-28 11:00:01 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 542015c72c4da279920c97eb8b581d02 SHA-1: 27e28fe8e97373deb553ea5273396471c1248756 SHA-256: 4279c5839c5e783a95d6ffb83f356a3b38c97f9979c7b6b8e3f8700665434ea5
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are numerically or generically named and hosted on unrelated domains, suggesting a link farm or SEO poisoning tactic. The document body text, though partially corrupted, includes 'Verificacion de factura digital sat' and references to wkhtmltopdf, indicating a lure related to tax verification. The primary attack pattern involves directing users to malicious URLs disguised as legitimate documents.

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://cannisafe.com/uploads/1/3/0/2/130287542/130287542.html#verificacion+de+factura+digital+sat
    • http://kaleshwar-groups.net/uploads/1/3/0/7/130739772/92e075d47e6db.pdf
    • http://nevenann.com/uploads/1/3/0/7/130738646/kobufobemidos.pdf
    • http://buddingbranchranch.org/uploads/1/3/0/4/130483412/bukawulame.pdf
    • http://northmiresouces.org/uploads/1/3/0/4/130435690/vunizetar.pdf
    • http://rimavop.store/uploads/1/3/0/3/130313577/komesabelowanekilif.pdf
    • http://ardentartistmanagement.com/uploads/1/3/0/7/130775859/9323517.pdf
    • http://www.yakimagrocerygirls.com/uploads/1/3/0/7/130739247/9147042.pdf
    • http://www.endo-cirugia.com/uploads/1/3/0/6/130639728/bikubikulobo-zudobosinibed.pdf
    • http://mdesignbymarsha.com/uploads/1/3/0/6/130620451/gokuwidipipimado.pdf
    • http://plantationpestservices.net/uploads/1/3/0/4/130435893/a0f5f8898.pdf
    • http://drumrollaudio.net/uploads/1/3/0/8/130873895/dc44159b59bd578.pdf
    • http://anne-denmark.com/uploads/1/3/0/5/130542872/kanupovube.pdf
    • http://minimebodysculpting.com/uploads/1/3/0/6/130620290/nisunaxuw-luvotonili-rubaviz-faxejaxufop.pdf
    • http://royalematch.com/uploads/1/3/0/7/130739596/e97cabc.pdf
    • http://dariahmathews.com/uploads/1/3/0/9/130969212/sorur_mujomoxow_nixazoni_vuwugixuvex.pdf
    • http://frogs-flies.com/uploads/1/3/0/4/130483703/xarekurapunon.pdf
    • http://demo.cequens.com/uploads/1/3/0/2/130287977/c938bb912188b.pdf
    • http://cecvcapacitacionvial.com/uploads/1/3/0/4/130483216/pisunexav.pdf
    • http://contractortampa.com/uploads/1/3/0/8/130813851/dowojumuroxev_tepumoziji_zefaworemubo_retox.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_off00006d99.bin
a6b56cbfbb8da441ccb34c61d7fb0b17c9bd3e75c92cd99c7e7054867237d4be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D99 8828 bytes

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