Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc57947d54bf19f9…

MALICIOUS

PDF

59.2 KB Created: 2020-10-15 09:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: ba0f19f761b2eb385ff0619d1d085d24 SHA-1: e98370f09fc2df33597e365a83e6267ccd9170e1 SHA-256: dc57947d54bf19f936343c7cc469cbbe91967fd9073fa927c76111525c53f1b7
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=abandono+infantil+en+el+peru+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5f876df7b74e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f870ff07b96e.pdfIn PDF document text
    • https://lasajiboz.weebly.com/uploads/1/3/1/3/131379041/mopavediwi-gunutik-moponuw.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/vifotatilaw.pdfIn PDF document text
    • https://vevejeda.weebly.com/uploads/1/3/0/7/130776099/18c46ddaf0eb7.pdfIn PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/vizumopobab_goxawuvedijizi_sijalozofukudu.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/jizogu.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/febafd3d195a9.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/40ddfa4d7f4e3e.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/2a74280d.pdfIn PDF document text
    • https://jobubati.weebly.com/uploads/1/3/1/4/131453688/getabexugabuxave.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/9276785.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/9031774.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/bigunurusipota_vovavubavuw_malolipesafa.pdfIn 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/51209098-e41a-42bb-a600-895f4619333d/sepirezopodusevumitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea21315b-6d20-40d2-9441-16fd2dccb001/90141526435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bc22bf3-00fc-4d32-ad6a-6d01677b604c/67592384399.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e78272b-baa7-4798-80c8-db3f6fe0f746/52012300100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dfe5e92-6b93-4509-837b-984478ae7629/vegikofonixupedelenoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c70c0b5-4aaa-4821-ac36-58f1497da201/wanijulibosonow.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_off0000a971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA971 4984 bytes
SHA-256: 6cdadf7a4c804d611e24d3dfdddfa73b1f8c827b07ca358f41bdb820b914a006
font_01_sfnt_off0000ba6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA6E 11464 bytes
SHA-256: d0cb30f46492871cbd9452d323b089579988365071a69843a27d28a7f07f6520

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