Malicious PDF — malware analysis report

Static analysis result for SHA-256 26577df3194d1550…

MALICIOUS

PDF

68.4 KB Created: 2021-02-20 18:35:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4a85e89652cea51d67de14632e03b95e SHA-1: c65bdcb1ce592e1231f6b2a810f4471134ed70bc SHA-256: 26577df3194d1550530e8466cadd307cb9294b6948aef0c1152a5f44d9585bee
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://seumenha.ru/123?utm_term=is+dork+diaries+book+15+out PDF link annotation
    • http://naziniza.22web.org/ginuwozut.pdfIn PDF document text
    • http://fapumew.22web.org/15th_wedding_anniversary_images_free.pdfIn PDF document text
    • http://tuworiki.22web.org/13270953622.pdfIn PDF document text
    • http://znasila.ru/club_amilcar_pegase2yo8h.pdfIn PDF document text
    • http://extrameets.fun/fobat6eews.pdfIn PDF document text
    • http://nemekarasika.iblogger.org/oracle_sql_queries_examples_with_answers.pdfIn PDF document text
    • http://bu-markett.com/31198199377bgwsp.pdfIn PDF document text
    • http://torchland.xyz/41998847718h9xu0.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/rejiner/counter_strike_free_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/steiermark_card_ausflugsziele.pdfIn PDF document text
    • http://puzexexaniledow.epizy.com/kindle_ebook_reader_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/movies_raja_tamil_free.pdfIn PDF document text
    • http://kikodanaso.epizy.com/63232924421.pdfIn PDF document text
    • http://xasaduditomup.epizy.com/answers_to_questions_about_old_jewelry.pdfIn PDF document text
    • http://lenawevurokolup.epizy.com/cervical_cerclage_procedure.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_off0000ccce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCE 5104 bytes
SHA-256: c0f8c34bc7fbeb4529086c194e84218220b82ad90e6e84daf0e70389434550ef
font_01_sfnt_off0000de3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3B 11748 bytes
SHA-256: 1b4b9fd197766bc9ec0285e0bd5c469d735e07670757b57d3e99bd70d2ba892c