Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebca2d5dd5029d76…

MALICIOUS

PDF

55.0 KB Created: 2020-10-15 03:58:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 43dba680b015382ef8354e9c48d50b4c SHA-1: ea77176b9b091727df55c7b1e096ebb4f3129802 SHA-256: ebca2d5dd5029d76b6c97a879dc5a122c7f31b67ca8041b0fc4a5069476f2974
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/strik?keyword=crompton+exhaust+fan+catalogue+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368770/normal_5f878dbaa34e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368954/normal_5f879a80bfd9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_5f87813032d99.pdfIn PDF document text
    • https://pobezewimo.weebly.com/uploads/1/3/2/6/132681951/luvigerovun_potapuriredakij_meralujawumuju_dewokumufe.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/tukowab.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ramugimexixepaba.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/9fd55072845169.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/godekux.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/6371798.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/zemosakegup_gopeworinibes_nowatope.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367287/normal_5f874cc80f860.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367625/normal_5f878d81850fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f878aaa46cd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f8762f6d6d2f.pdfIn PDF document text
    • https://ninukiwipovesot.weebly.com/uploads/1/3/0/9/130969879/74ae5439bbe84.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/wetasigojat.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/132f7bc.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/delelides_dasexurekiwar_jajumab.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/c25f730.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f875edf66fbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366627/normal_5f87626c4e4e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368230/normal_5f87801b76931.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f87132cf20c9.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00008522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8522 1580 bytes
SHA-256: 67de5adcf67cd519c442c6b1cfd5796b304b0fbaa3b62c5c9182dff170aecaf9
font_01_sfnt_off00008d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D14 5540 bytes
SHA-256: 6cb1a533ee332ca13f7ec055a57ecbabff737278732597d7b4683af23417e638
font_02_sfnt_off00009fb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FB9 14740 bytes
SHA-256: 66860e8925bd5f9719cab82e6f62c997fc4d2af82e4b6e51a3543a54d3f39264