Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c61aa9a89b490a0…

MALICIOUS

PDF

42.6 KB Created: 2020-10-05 07:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0176655035bfb262b1b739b5a77c5103 SHA-1: 6c9f83dd91c8b3d2fae0e8912d7e5aa8ad71fc4a SHA-256: 4c61aa9a89b490a0bd6cc93189f58253237f1809bb5b9a323f9eb85c95750059
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/strik?keyword=starbucks+delivering+customer+service+case+study In PDF document text
    • https://site-1041946.mozfiles.com/files/1041946/wabavurako.pdfIn PDF document text
    • https://site-1036629.mozfiles.com/files/1036629/tivafixuxovatumisanomoz.pdfIn PDF document text
    • https://site-1037922.mozfiles.com/files/1037922/30425051901.pdfIn PDF document text
    • http://files.emsathletics.ca/uploads/1/3/1/4/131453194/81fd0f9e3.pdfIn PDF document text
    • http://rivelowa.regenbiopharmainc.com/uploads/1/3/1/3/131379362/2ad7216225.pdfIn PDF document text
    • http://files.lemondropdivas.com/uploads/1/3/2/8/132814929/rolaxekesip_kezusizekov_weniwu.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/1/0431/2009/9488/files/5736936542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6175/4518/files/zibub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8480/8346/files/gi_joe_tiger_force_recondo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5419/3047/files/song_angelina_by_hoyt_axton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aee93f0-ead1-4e9d-a9c0-363b4c7537f5/82664755801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47bb98f2-1f68-47b6-8fea-69a72007aa9e/pudupusetobex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8952ee2-2889-457a-9b78-0804b1b68044/3537998118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b55e1f1-fe94-41db-a4cd-29a01c340a41/66587650271.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4292e54e-81e7-4c9f-b3bc-14386dd02c2f/fuvuxilezulis.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_off000063d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D5 5728 bytes
SHA-256: e23fd6d14349064d7e1862e978bb95230315b06bc61029d3fb3a64abc82e1a0e
font_01_sfnt_off0000774f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x774F 11132 bytes
SHA-256: 7f2d28bd2e41241ea410452dd9c322db4c74110967cf0b5b4002be3fc1d3b6b9

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