Malicious PDF — malware analysis report

Static analysis result for SHA-256 b331f352cebcf2f4…

MALICIOUS

PDF

44.6 KB Created: 2020-10-16 02:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: b0ee041050ea69542d8c5f5bdae55be4 SHA-1: d523e0611ea399ab52b86f6163a7e9bfd3690304 SHA-256: b331f352cebcf2f4c8bae807f05ededc5fb0dc60d3c1ca723512d1eac27d9bd5
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://ggtraff.ru/123?keyword=apoyo+psicosocial+cruz+roja+pdf In PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/d73b6a65c079055.pdfIn PDF document text
    • https://javezevefumutew.weebly.com/uploads/1/3/2/7/132740470/8217003.pdfIn PDF document text
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/f45654ede247.pdfIn PDF document text
    • https://nepufetok.weebly.com/uploads/1/3/1/4/131438640/8fcfbf8cdcd935.pdfIn PDF document text
    • https://dosedupuwosiwoz.weebly.com/uploads/1/3/0/7/130776272/8588809.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5f88bc5ce485c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f8712739ba95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f8765448d3cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369633/normal_5f88cca0b5c03.pdfIn PDF document text
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/podewafi_lamatuvowud_botemuzoxojabof_firamixivosib.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/vokuvaworotegi-gatusukatim-xemugifuripig.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/5074999.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370063/normal_5f88320be5e9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f88cc187e2e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369152/normal_5f88cf9f1a547.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/aa4e6083-d92b-40d3-9473-0af028303cb4/vaxolazofufipigufude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/996a4f74-aa2d-4878-96b4-d78e48d318fe/pelevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af720038-2178-47aa-a9d6-51a0e6a408db/poporonuvitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98699dc6-4ca1-43f3-a892-6013f6af4227/23748454393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c563d8-916c-4467-bed9-bc77628e2044/panululowexowugi.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8D 5364 bytes
SHA-256: 95fcdce820ecfd6f0acb8ad97b351b049ff107b382049c77c65de278e1dec715
font_01_sfnt_off00007ee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE7 11168 bytes
SHA-256: 7099002639711512d8942c7d586f57e85e39969f98512fe602bb335cef188c97

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