Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f32ada8f3b30fc…

MALICIOUS

PDF

86.3 KB Created: 2021-04-06 13:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e9ec61ca8acb6be649624fbecd5b6fa8 SHA-1: d06b16746b187d614401e1deb854c7d2d0393097 SHA-256: 59f32ada8f3b30fc08666d85514abd33ef56ec242e5fc3a7576d511ebc1e455a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains multiple embedded URLs, with a primary focus on directing users to sites related to 'Briggs and Stratton pressure washer spare parts' or similar search terms. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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://vilenefex.ru/strik?utm_term=briggs+and+stratton+pressure+washer+spare+parts PDF link annotation
    • http://craftsmansmetics.com/xobokimivoxehp28.pdfIn PDF document text
    • http://ryukzak.digital/vudupomotipuvopiniwanuto2z2s.pdfIn PDF document text
    • http://microdigitalmeter.xyz/tafugadejurafarepabatumiscl6bu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391001/normal_60532275eb56e.pdfIn PDF document text
    • http://fruittea.space/mugiwuxutujagofukarip12v0.pdfIn PDF document text
    • https://redobikarus.weebly.com/uploads/1/3/5/3/135396910/zifejetujizuvogivu.pdfIn PDF document text
    • http://topstudy.fun/los_protocolos_de_los_sabios_de_siC3B3n_libro_completo_descargar_gratisrysnp.pdfIn PDF document text
    • https://delazodudiz.weebly.com/uploads/1/3/4/5/134591817/sosaliguruzuwiluwawe.pdfIn PDF document text
    • http://suraneb.scienceontheweb.net/caractersticas_del_aprendizaje_significativo_y_memorstico.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_604893082baab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480581/normal_604e916f5f727.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464522/normal_5ff5b39323531.pdfIn PDF document text
    • http://my-favshop.online/dashboard_reporting_templates_excelckiqs.pdfIn PDF document text
    • http://thrivewebs.com/340371651243hduw.pdfIn PDF document text
    • http://a-trvl.ru/72437210788aay74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464542/normal_6049345f42080.pdfIn PDF document text
    • https://dajilifu.weebly.com/uploads/1/3/4/8/134891154/42f5f06.pdfIn PDF document text
    • https://loneluripovulom.weebly.com/uploads/1/3/4/3/134364014/6459291.pdfIn PDF document text
    • http://dufigep.scienceontheweb.net/aws_certified_cloud_practitioner_dumps_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vipinib/53253749988.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/diccionario_nautico_espaol_ingles.pdfIn PDF document text
    • http://givetupazowo.onlinewebshop.net/numbers_worksheets_11_20.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/polimofuw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10320 5212 bytes
SHA-256: d746bab96e1ac7f48049c1db4e2bbe7a14a385323fac7778118df4f4f464aad2
font_01_sfnt_off000114e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E1 11444 bytes
SHA-256: b8307dccc1b2f5a5baf6281605b9210357776eb75e4cd0b27fd741cd3314fcae
font_02_sfnt_off00013b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B48 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2