Malicious PDF — malware analysis report

Static analysis result for SHA-256 18205c98b1ac1008…

MALICIOUS

PDF

79.6 KB Created: 2021-03-02 16:42:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 703886ea1be55c5b0e873177724afe47 SHA-1: 72d892d1884d6e592ac1513014cfd143f5c4e7c2 SHA-256: 18205c98b1ac1008b88325630835d0b89ac647e5de25ae4a12599d8c0c621346
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain search-related terms, suggesting a phishing or scam lure.

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://dafemum.ru/123?utm_term=where+to+buy+the+vegetarian+butcher In PDF document text
    • http://cleaner360.shop/352146359282bvd3.pdfIn PDF document text
    • http://japancar-sib.ru/does_walmart_have_white_christmas_treesoymvh.pdfIn PDF document text
    • https://fanolukexepafo.weebly.com/uploads/1/3/0/9/130969893/ruwofimotut_rujuj_tenesupetipukew.pdfIn PDF document text
    • http://thailandlove.site/irganox_1010_safety_data_sheetit58s.pdfIn PDF document text
    • http://freds.space/what_is_meant_by_hidden_hungerlgutk.pdfIn PDF document text
    • https://fedonofawok.weebly.com/uploads/1/3/4/8/134881994/6460855.pdfIn PDF document text
    • http://wordwild-store.com/tabumavolenerq8y8j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420764/normal_5fd22a85208c4.pdfIn PDF document text
    • http://winoorama.site/timemipafepopajiw3cq6q.pdfIn PDF document text
    • https://metuwudoguwo.weebly.com/uploads/1/3/5/3/135323448/vebuzem.pdfIn PDF document text
    • https://gorofegi.weebly.com/uploads/1/3/4/4/134462705/tovezemotimuwu_rilimixuza_jibaworusut_ripafupew.pdfIn PDF document text
    • http://ritual-venki.online/lopadibamishwmm.pdfIn PDF document text
    • https://punujagenak.weebly.com/uploads/1/3/0/7/130775029/fogipolem.pdfIn PDF document text
    • http://kepojitu.22web.org/what_is_intradistrict_permit.pdfIn PDF document text
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/9244807.pdfIn PDF document text
    • https://lokawinopigu.weebly.com/uploads/1/3/2/7/132712062/xasutabesap-fevejegaril-pawodumi-bulat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://benifolagalat.epizy.com/dopufinumitoto.pdfIn PDF document text
    • http://femasusatatovet.epizy.com/lunalifinazisu.pdfIn PDF document text
    • http://lobabixagoxip.rf.gd/72181300185.pdfIn PDF document text
    • http://votoromuw.epizy.com/google_sheets_multiple_filter_views.pdfIn PDF document text
    • https://medlineplus.gov/recipes/vegetarian/In 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_off0000f978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF978 5168 bytes
SHA-256: 56fb7811410e27104694b3196c5f4537b9bca30f1e03fc8fee1f799d3a700304
font_01_sfnt_off00010b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B27 11144 bytes
SHA-256: 4a63c38399ec2cae4f8fcf7e00508a6f71bc856c50f91b1e0b27427a3bbda817

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