Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb58600dc3fbb5c…

MALICIOUS

PDF

40.3 KB Created: 2020-10-14 18:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 48868d422b4a9f18c6a3ba7fa05b2adf SHA-1: 135038adddfb0f19601004e1d505c222eeae2e10 SHA-256: 9eb58600dc3fbb5ca4c5db772e6b5588d732094357cc784c0dd924a9df76279a
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=nsw+road+test+guide In PDF document text
    • https://site-1036637.mozfiles.com/files/1036637/59316491040.pdfIn PDF document text
    • https://site-1037054.mozfiles.com/files/1037054/9188625795.pdfIn PDF document text
    • https://site-1040329.mozfiles.com/files/1040329/70005902096.pdfIn PDF document text
    • https://site-1043696.mozfiles.com/files/1043696/lufisigikujogobeminiwike.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/8282837.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/bupemigimamuvap.pdfIn PDF document text
    • https://jovofodofipepij.weebly.com/uploads/1/3/2/6/132682866/5728316.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f8708b83f663.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f871399b4613.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f87198a452ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f87178f10535.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_5f8710c78be75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5f87160c3d8b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f87076ee7252.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f8717a6c18cb.pdfIn PDF document text
    • https://site-1036818.mozfiles.com/files/1036818/nijenifidimabatalito.pdfIn PDF document text
    • https://site-1040878.mozfiles.com/files/1040878/78530813260.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7274/9721/files/craigslist_phoenix_cars.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3097/7434/files/41321516040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4404/5468/files/difference_between_medieval_and_renaissance_art.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1740/3557/files/30099763919.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_off0000601d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601D 5024 bytes
SHA-256: f1bd159c6329f3b2f646c7b651ce1a546ba9d89f0e714413e3af2a8a9306ab9f
font_01_sfnt_off00007155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7155 10276 bytes
SHA-256: 59f5c3a2dc550e1affe414a2cc022e357127305274d8290965d3e08a7c956d90

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