Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ce1437737eb5f4…

MALICIOUS

PDF

68.2 KB Created: 2021-02-10 19:01:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b522fb56f759842871d3cea8907b6c23 SHA-1: 5c8f1f0dc09b1badcd84e83fad7d7592d003d4e8 SHA-256: 45ce1437737eb5f44f79b5dc04a540e6ae7599e724ca16b0bdc08e6e974a2ac8
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 https://jottigo.ru/123?utm_term=venstar+t1050+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4418565/normal_6009277101e52.pdfIn PDF document text
    • http://losmopaka.site/mudafalivesas4xohl.pdfIn PDF document text
    • http://copyrightshelpcenter.com/sheets_of_plastic_lowes7wlep.pdfIn PDF document text
    • http://covid-19online.site/12297928052lfdk0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446636/normal_5fdc6000d375f.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/hLbPXrn/46013126283.pdfIn PDF document text
    • http://vwwv-avito.online/bloomington_mn_police_department_arrest_reportsbq8al.pdfIn PDF document text
    • https://wujadagepixiv.weebly.com/uploads/1/3/1/8/131856877/7598980.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393489/normal_5fe2cedd89c10.pdfIn PDF document text
    • http://ttop-shop.com/channel_4_news_detroit_reporterssd46o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448986/normal_5fc82d5db7c3c.pdfIn PDF document text
    • http://ozalupa.space/acute_pulmonary_embolism_guidelines_2018jmcbj.pdfIn PDF document text
    • http://fruittea.space/50532453507d6wvq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412573/normal_601a044bf0743.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369486/normal_5fc917064349b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0E 5116 bytes
SHA-256: 2d66e315b818f38f0db3b3d68452517a249878f57da61513aa3241deef8a2848
font_01_sfnt_off0000df65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF65 10780 bytes
SHA-256: 15691ca318ac2afde106c000b3abbcf3e57d1dce56f947564c1915943f2e0d5f