Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b63f700b631197f…

MALICIOUS

PDF

63.5 KB Created: 2021-02-18 07:01:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e331c4064bc125faab9bc6a8f49445b3 SHA-1: f1e03459c2300410c4b3d71fd2e2bb22782cb1fa SHA-256: 4b63f700b631197fde4d69e01baab0805a0514ff9242c8bda581384759f1431e
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/wix?keyword=cynthia+frelund+projections In PDF document text
    • http://martakkord.ru/33149765013xldwe.pdfIn PDF document text
    • http://com-signto5.xyz/jasepoooa8s.pdfIn PDF document text
    • http://doorstepcomputers.com/65952619455ucdi2.pdfIn PDF document text
    • http://lnstagram-badge-verification.com/automation_studio_6._0_64_bit200r4.pdfIn PDF document text
    • http://all-system7.work/rodimopupuxokuxediniwa486cc.pdfIn PDF document text
    • http://cashbackmoney.info/training_workbook_templates_free061w5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489586/normal_6000e6cc2a6fd.pdfIn PDF document text
    • http://vykupavto54.ru/87057745261uaiwh.pdfIn PDF document text
    • http://roflan.site/music_concert_brochure_templatel6rl2.pdfIn PDF document text
    • http://antonioita.fun/6513259459536ob6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416786/normal_5fcae55eb417d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386836/normal_60082071610ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367313/normal_5ff32a61b4271.pdfIn PDF document text
    • http://politach.com/hex_stars_mod_apkh0d56.pdfIn PDF document text
    • http://procripton.com/garijivemix8d2g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414166/normal_6013ccbcc4517.pdfIn PDF document text
    • http://italdom.fun/zavevawixikimegidzu6e5.pdfIn PDF document text
    • http://lovepositions.info/jotajowamef6xee.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/remove_curse_of_vanishing57x3h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/boxer_briefs_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/web_page_development_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/android_apps_on_macos.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/4765568363.pdfIn 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_off0000bd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD9B 5328 bytes
SHA-256: 08dfaba31d1130e08f7f0a5cc00754187627520791cb6c1eb941c4df47812684
font_01_sfnt_off0000cfba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBA 9636 bytes
SHA-256: 429f0e2343738ce4f058ee0170d3d6543b2bb1e95cbe030a375201a9f8e8d36c

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