Malicious PDF — malware analysis report

Static analysis result for SHA-256 bab8da89b7fcd927…

MALICIOUS

PDF

44.7 KB Created: 2020-10-08 23:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d0f2b402ad5e7098b12287b46f3661aa SHA-1: d27c9abf6aea62d7697513b3140d4774715d3c5f SHA-256: bab8da89b7fcd927ac90087f37074c03a2a94981be48394efa498f66547234a5
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://gettraff.ru/strik?keyword=affidavit+in+lieu+of+originals+oci+download In PDF document text
    • https://site-1036786.mozfiles.com/files/1036786/zodifo.pdfIn PDF document text
    • https://site-1037048.mozfiles.com/files/1037048/24899877058.pdfIn PDF document text
    • https://site-1041483.mozfiles.com/files/1041483/dojusudisudijawiw.pdfIn PDF document text
    • http://xubije.thelongwellfiles.com/uploads/1/3/1/4/131408899/jepufi.pdfIn PDF document text
    • http://nirovag.belizehomesource.com/uploads/1/3/2/3/132302987/bce25c8.pdfIn PDF document text
    • http://jusop.camuzphoto.com/uploads/1/3/1/4/131407283/462763.pdfIn PDF document text
    • http://makak.eastpointhorspice.com/uploads/1/3/2/6/132681308/8002935.pdfIn PDF document text
    • https://www.in.ckgs.us/oci/index.shtml2In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bea5c07-c57e-4c85-a523-364b5b012edd/69684499472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97de6b7b-fb34-438c-8dcd-eba58fc81f71/225328842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/023879a4-1049-4069-9c3a-2e5c77e25eab/dejulivilasilimetojabexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5dc7884-7662-4c67-8393-213064a6e5f3/wexofidaxubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2afb5442-c298-4f98-a91a-284c0c3ce0bd/kitewisoxogikinan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43e9a51e-1dc2-45e0-90b4-768f68b3d2ba/liwesux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c0e198a-9b69-4c86-8e34-2eaad56dfea5/biwufapowujudutuvubijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f021e276-2ebf-419a-9d09-6ddf9880db3f/33289629402.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f58b90c-bd21-4c21-9fb3-8f2ad6d04197/51092043569.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_off00006ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC1 5332 bytes
SHA-256: 64df293317b4f6d9577cdacd6a7011726e72f731a9b6e2f6b9ab0408f73263c8
font_01_sfnt_off0000810a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x810A 10812 bytes
SHA-256: e8066dee8d19354430d70a73629e586894136d1c01f445314fedacb270201856

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