Malicious PDF — malware analysis report

Static analysis result for SHA-256 e08c0c44c21e6617…

MALICIOUS

PDF

90.4 KB Created: 2021-03-30 02:35:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e189fa4e0b96527359194495d9c0fd1b SHA-1: 40a02ed0231902d1a86b1cc6b4cc95a4da8d4756 SHA-256: e08c0c44c21e6617e6e54b57a91e350f7ea5413398719097587116e6135565fe
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, which is a common tactic for phishing or distributing malware. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs, such as https://xezojetit.ru/strik?utm_term=bleeding+from+going+too+deep, are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • 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://xezojetit.ru/strik?utm_term=bleeding+from+going+too+deep PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481056/normal_5ffa23d9b81f2.pdfIn PDF document text
    • http://fuwiduwoxobol.mygamesonline.org/multi_banking_system_project_documentation.pdfIn PDF document text
    • https://cdn.sqhk.co/povewepalu/Wgf8YxJ/wesley_umc_middletown_pa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426819/normal_5feb15990b56e.pdfIn PDF document text
    • http://xamoxipuwizutux.scienceontheweb.net/87887024531.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450730/normal_5fcfaf6375d5d.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/ifibhbm/miro_aew_wiki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_602f2089dab40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486365/normal_603ba9743a5c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476595/normal_5feb433bcfca8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454049/normal_5fcf53422a88c.pdfIn PDF document text
    • http://vizexibidoxi.getenjoyment.net/25421755984.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/P0Picjc/erebus_haunted_house.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387417/normal_604fa42b62e74.pdfIn PDF document text
    • http://leninuludobodu.mygamesonline.org/antigone_sparknotes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480880/normal_5fddb5549fd92.pdfIn PDF document text
    • http://motarojetox.sportsontheweb.net/linularagolob.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobuwaxegu/gmqjhtH/bonupevimo.pdfIn PDF document text
    • http://merexazumebenag.medianewsonline.com/computer_aided_design_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/eieihhm/21559996328.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482629/normal_5fee3de6f29d2.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/powermatic_2_electric_cigarette_injector_machine_for_sale.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f0d491a7-7d72-4eea-bbd3-72ad31f48a9a.filesusr.com/ugd/1acdab_5ee5d2b379a440b0bfafdd85c4bc74e3.pdf?index=trueIn PDF document text
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_707d5d3b2b2c4d41a50485c293bbafb4.pdf?index=trueIn 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_off00012512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12512 5020 bytes
SHA-256: b16d6175445d14898d4f4e94708b2dfa4211ea77512a18a70f7995b56fe25338
font_01_sfnt_off00013619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13619 11152 bytes
SHA-256: eecc313e5ab8e8c5384125d4f811c684a1c8d701838304863b3f8398e9b82d65

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