Malicious PDF — malware analysis report

Static analysis result for SHA-256 b49a3ae856e43d5c…

MALICIOUS

PDF

65.7 KB Created: 2021-03-02 15:15:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 12634b181dd149c01bb9a789b93dadc4 SHA-1: 4d6e15c02487e1859b0de9ac2fd69447e18cf75f SHA-256: b49a3ae856e43d5c18bd10b5af67d0fe018e42a19e5d3680e7d224a7b8950af0
166 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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://maypoin.ru/award?keyword=the+american+history+book+mcdougal+littell+pdf.
  • 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://maypoin.ru/award?keyword=the+american+history+book+mcdougal+littell+pdf PDF link annotation
    • http://mon-compte-cmb.best/43221390061ks53s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415531/normal_6028adff7807c.pdfIn PDF document text
    • http://ideaita.fun/adalimumab_prescribing_informationmga5k.pdfIn PDF document text
    • http://inmyshtangen.xyz/83364353364u0j7x.pdfIn PDF document text
    • http://allrecipes.pro/nicki_minaj_barbie_dreams_download6zv5f.pdfIn PDF document text
    • http://ecoterritory.store/52403740632zxfh1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379240/normal_5fe0b7fc40953.pdfIn PDF document text
    • http://bapexuwepurisig.22web.org/blank_three_column_chart_template.pdfIn PDF document text
    • http://detonic-official.website/epic_7_yuna_connection_guidek0j3p.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/putelekireza/96426516244.pdfIn PDF document text
    • http://jibovofafef.epizy.com/freelance_hiring_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/keperukazalepejebajezazag.pdfIn PDF document text
    • http://liwubujuwu.epizy.com/66370769462.pdfIn PDF document text
    • http://pejenusiloxo.rf.gd/kikulozazomenaxuje.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/ard_mediathek_app_film.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_off0000c38b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC38B 5824 bytes
SHA-256: b8cb483f3733ac88a60493d527e358f23820254d686693c965f590b1f028f351
font_01_sfnt_off0000d733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD733 10260 bytes
SHA-256: 3452ad70c7aa3cb7e9875a9ceaba1f5d5742c9c8f1e266e10c4b83f1b06cf0a0