Malicious PDF — malware analysis report

Static analysis result for SHA-256 7957b9a751b8e58f…

MALICIOUS

PDF

42.0 KB Created: 2020-10-01 20:07:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: de15206a55edc5606579e74f48e45551 SHA-1: 9d99c98c75ee5da1845a89c5e5f3f540297b6fea SHA-256: 7957b9a751b8e58fb3cd9dda5975110c6ac3159b4fd16f0103bf1e6cce15658a
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=pdf+journal+marketing+management In PDF document text
    • https://site-1038634.mozfiles.com/files/1038634/vepirivojanixuwu.pdfIn PDF document text
    • https://site-1037276.mozfiles.com/files/1037276/mabipagunixisigal.pdfIn PDF document text
    • https://site-1036785.mozfiles.com/files/1036785/87760618028.pdfIn PDF document text
    • https://site-1037091.mozfiles.com/files/1037091/54417815409.pdfIn PDF document text
    • https://site-1039506.mozfiles.com/files/1039506/zaxaso.pdfIn PDF document text
    • http://files.thewifebehindthefarmer.com/uploads/1/3/1/0/131069950/kunerizipi.pdfIn PDF document text
    • http://lamubo.summerwoodresort.com/uploads/1/3/2/8/132814718/kuseku_semanegujifixo_lisuda_bosis.pdfIn PDF document text
    • http://mefemex.northbranchsummerrec.com/uploads/1/3/0/9/130969339/sulemuzapulij.pdfIn PDF document text
    • http://metaz.cleanwaterforlavallee.org/uploads/1/3/0/7/130739564/meradigexad.pdfIn PDF document text
    • http://ruberota.eosmithfoundation.org/uploads/1/3/2/6/132682156/63fa2845ba6fa4.pdfIn PDF document text
    • http://zutonul.charlottehager.com/uploads/1/3/0/8/130874134/pilezagegevu.pdfIn PDF document text
    • http://kadoboxox.samakiecosystems.com/uploads/1/3/0/9/130969465/5d4d5bece8.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/119332ce-bf2f-4560-8d69-bddfae8e078f/pokefotoromukuveva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b2b4bea-9b32-4054-bc1c-be1bd54270f1/25893611477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e510ccf6-0943-4958-b756-06ce427c08c9/vetoza.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_off0000598a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x598A 5188 bytes
SHA-256: 0932448d09edb7f03412bb6f9c9f0b9e194410f5f723329eb1bdcd1f940bdbca
font_01_sfnt_off00006b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B27 15668 bytes
SHA-256: f35231bca1d5e7ba354966ceeb9d66d177c784b13cc207333e3ee6c7d1e230ab

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