Malicious PDF — malware analysis report

Static analysis result for SHA-256 67dd8aedf0751487…

MALICIOUS

PDF

46.3 KB Created: 2020-10-14 20:11:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 38a03d108090dd2c39cf820bc54865ec SHA-1: bd380562b6e4ab9425417aaefc7cc7e06b6965bb SHA-256: 67dd8aedf07514872d84d5275c97ba48110eb8eb5d9ad4ac1e640bb7f6e6443a
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://cctraff.ru/strik?keyword=bogoroditse+devo+satb+pdf In PDF document text
    • https://tejigenunonim.weebly.com/uploads/1/3/0/8/130813632/jazapoxutob.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/c8a1498.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/613a711ec7ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f87086c4e88b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f87253da6845.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f86febd66481.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f8709f58a364.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f8726a339dc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f86fb08daf31.pdfIn PDF document text
    • https://site-1039861.mozfiles.com/files/1039861/zakinalesegusavegasam.pdfIn PDF document text
    • https://site-1036655.mozfiles.com/files/1036655/zematotutivikexuroji.pdfIn PDF document text
    • https://site-1041770.mozfiles.com/files/1041770/ditopedewe.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/7133e34f-bb59-4a5d-b2ac-3fa03bfbce58/lamariripodexolim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bcef9d9-b339-41c0-b743-9f4d6cd607a8/pufixerugura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67f753a6-b0ac-4f09-a362-9022a4a47532/72311900867.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48d17911-db6e-4544-9017-dba6040a7f35/zepumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a9aad17-ac91-4d30-8bb5-b341f80e567b/sesulazasaxopesogudeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c29280d5-9db6-4041-b75c-2e81fb941c1f/sidususanosisidapumetobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba489f7f-5b09-4ea7-9f1d-7f3efcb3e140/24448342168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5845edf5-0866-41f0-9e61-dc391775c068/kibixudegutupos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/710f3d78-e69e-45ce-93b9-dd2e3726eb5e/29313580403.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_off00007672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7672 5424 bytes
SHA-256: 85f7a62e9f7153416de8fe830833dad17e859b8518a0b929babb84c1bb562285
font_01_sfnt_off00008900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8900 10156 bytes
SHA-256: 0de6d50a361e36e5c99265aaa812c222b034041cdcd07867d046dc4260fc3fd8

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