Malicious PDF — malware analysis report

Static analysis result for SHA-256 f48bdf082fe3f58c…

MALICIOUS

PDF

69.9 KB Created: 2021-02-19 17:03:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d73d7ab8ff41d69130ccbc8f1852eda0 SHA-1: 1165d91f8c7840f47cfd0b2fdf2cc878c4abf747 SHA-256: f48bdf082fe3f58cb20102d582a9a123a9a098705fa03070879d0bac21da7c65
186 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.
  • 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.
  • 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://baarspo.ru/wix?keyword=teacher+answer+key+go+math+grade+7 PDF link annotation
    • https://towipikegogu.weebly.com/uploads/1/3/4/6/134690187/2513169.pdfIn PDF document text
    • https://cdn.sqhk.co/lebexuzo/bjhhihc/shell_club_fidelite_telephone.pdfIn PDF document text
    • https://xuzizalebu.weebly.com/uploads/1/3/4/7/134772475/89f114a9436.pdfIn PDF document text
    • https://rusaxexuratibu.weebly.com/uploads/1/3/2/6/132680860/4c67611e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404514/normal_5fdc75cdd98ab.pdfIn PDF document text
    • https://cdn.sqhk.co/sawowudin/aTXigqN/alone_season_7_callie_tap_out.pdfIn PDF document text
    • https://cdn.sqhk.co/zexetiminav/c7ehjgh/here_i_go_again_karaoke_youtube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468534/normal_602eae253d9d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478946/normal_60159d37afeaf.pdfIn PDF document text
    • https://wegebumerovoni.weebly.com/uploads/1/3/5/3/135387929/rinibadase-zevusa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447466/normal_5feb1f3e6eb0f.pdfIn PDF document text
    • https://litolojinoforiw.weebly.com/uploads/1/3/4/7/134721995/nedokawimowuxuwupox.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/luxaduzimase/jugipenepuv.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/resume_template_microsoft_office_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/gorirakikez.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_off0000d476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD476 5608 bytes
SHA-256: 89c57bffafb8ba30f6e28deee43e1bd3dc512921b527cf8e0a522fd9f4ad2aad
font_01_sfnt_off0000e77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77D 10420 bytes
SHA-256: 0899ee3ecddf086b578452bd95244c440ea7486085d6f367b7be4cfe92327f3d