Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c8ed586aae87967…

MALICIOUS

PDF

49.5 KB Created: 2020-10-15 12:12:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e742f01fb79bcf97117ede08bfe102d5 SHA-1: e3ef9573946e347143cf9d271dffc45a31e52068 SHA-256: 6c8ed586aae879673df9391af92d775853d5807f2a4003e5bed28f5ac95e48c9
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=preservative+efficacy+test+usp+pdf In PDF document text
    • https://site-1042834.mozfiles.com/files/1042834/letukonedexivu.pdfIn PDF document text
    • https://site-1042886.mozfiles.com/files/1042886/63619092213.pdfIn PDF document text
    • https://site-1039319.mozfiles.com/files/1039319/26480006675.pdfIn PDF document text
    • https://site-1037909.mozfiles.com/files/1037909/17824660409.pdfIn PDF document text
    • https://gamupizesusaza.weebly.com/uploads/1/3/1/3/131398140/vapujenipujij_lutam_jasixajepubese_lumedilozen.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/ruxozukozuvazu.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7360136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f8722f5df299.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f870e125c99d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368997/normal_5f87f60cab81a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5f87bd20420b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367646/normal_5f874bea49c5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5f8706cb8e032.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5f87502ad6ba3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_5f8762ba48a0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f8729d1568e2.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/1/0482/4878/3010/files/bible_verses_about_community.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4530/6011/files/math_by_mary_kate_and_ashley.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_off0000835e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x835E 5280 bytes
SHA-256: 1c1201d7054217a5ba15f8ca8d1c03f7a2700f874d7cf94a962fb7dbb7987d2f
font_01_sfnt_off00009568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9568 10304 bytes
SHA-256: 1f1ee540e58b4b7effd7bc3c955757b382efe05e960d10202da6bc5f0edae1ec

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