Malicious PDF — malware analysis report

Static analysis result for SHA-256 51713446b93050b4…

MALICIOUS

PDF

66.9 KB Created: 2021-02-24 19:17:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: c29a7c0f91a99b37474e991dbb64da7c SHA-1: a705f59972a6204b6110479a2cc7b788d0d97122 SHA-256: 51713446b93050b4b3b282baa6c563fe9edcb4e9768125ced982b881b3ab872e
184 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
  • 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://yafferge.ru/award?keyword=where+is+the+shear+pin+on+a+snowblower In PDF document text
    • https://static.s123-cdn-static.com/uploads/4407552/normal_5fcf06016e8d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368951/normal_5feddd886579f.pdfIn PDF document text
    • http://gebajajax.22web.org/program_evaluation_report_definition.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/mit_computer_science_reading_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465149/normal_600da1f03f4f2.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/aja_ki_pro_ultra.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422386/normal_60170159ca877.pdfIn PDF document text
    • http://leledup.mypressonline.com/weight_loss_chart_printable.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/lowrance_hook_3x_dsi_review.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/rivotigivuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482020/normal_5ff12bcd87f4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480145/normal_5fd2eadbe3d6f.pdfIn PDF document text
    • http://jenirafona.22web.org/vunemomosibarupupi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wazisosixi.epizy.com/boxemelidutewip.pdfIn PDF document text
    • http://ginowane.onlinewebshop.net/37121691875.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_off0000ca7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA7D 5152 bytes
SHA-256: 0ab421fc7eb63f3ec8e0fdd6c849c01d688cd7581ebcc33c81e33d265ab103e2
font_01_sfnt_off0000dc10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC10 10052 bytes
SHA-256: 73746e581aad2587add230f6d52ff42bb3e192ccc91b68f43a345153bec9d706