Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8821fff626b8bb1…

MALICIOUS

PDF

82.0 KB Created: 2021-02-13 04:43:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 4597a862657ee0ebb1dea854aea2f39d SHA-1: 28a83a0c36808b93953885b13df25dee63ee661d SHA-256: c8821fff626b8bb1e5e2cdf9f0028530fd137abd0fc44d4781eacef80a3f665a
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wb?keyword=sky%20sports%20tv%20guide%20today PDF link annotation
    • http://m-laskin.ru/mozilla_firefox_old_version_free8c21e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527237/normal_5fe307343d370.pdfIn PDF document text
    • http://geesecam.com/61335959197olrt4.pdfIn PDF document text
    • http://topchambre.xyz/12th_marksheet_2010o3o6t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412606/normal_6013a62c48204.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383302/normal_5ffe704ed67c3.pdfIn PDF document text
    • http://sbrf.link/moxipaizrkq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392864/normal_5fea102a47341.pdfIn PDF document text
    • http://mavitrade.com/cassiopaean_transcriptsloq6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467286/normal_5fc86d0e7f077.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jaliselisasi.rf.gd/39949521053.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/application_form_for_road_accident_fund.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/77181121303.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/weather_report_dinanagar_gurdaspur.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/antecedentes_judiciales_policia.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_off000104c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C8 5424 bytes
SHA-256: a4d6d2267b5a67094b2e729253c27d03cdb7e75ac7f6c11a991933020c35bb0a
font_01_sfnt_off00011759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11759 10572 bytes
SHA-256: ea06d35023f54eedd6c19fcd90c13238caac26d5cd4c28760db5c36d5ee24ab7