Malicious PDF — malware analysis report

Static analysis result for SHA-256 c98c5b8b6c464e0d…

MALICIOUS

PDF

47.5 KB Created: 2020-10-27 03:31:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: b0892e3de51799ec0c70a1ce49e8de8d SHA-1: d6a7d3bd346ab4da91d906792c08dec8422a572c SHA-256: c98c5b8b6c464e0d17000e1f30fcf3a548f752e4c06fe5cedcf2900427908d39
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/123?keyword=astro+van+length In PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/bowabofes-fadoraxeziluzep-sanubiludazesi-bufazo.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/farepo.pdfIn PDF document text
    • https://tanifovekula.weebly.com/uploads/1/3/1/3/131379991/zavuvuvinigawowu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389354/normal_5f94b0d7cfb7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385412/normal_5f8f6e30852c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369769/normal_5f8edb8e61436.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386334/normal_5f936c8676cf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423430/normal_5f97716b5bc61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375196/normal_5f8d46a923b5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f874ebc3e357.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382958/normal_5f95a450d52d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_5f8e4e08849d1.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007a8f.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007a8f.bin)
    • https://cdn.shopify.com/s/files/1/0501/6233/5919/files/15762358695.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3030/1853/files/rural_king_paducah_kentucky_telephone_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6838/1591/files/periodic_trends_worksheet_answers_page_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6221/3789/files/24946994149.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5670/8770/files/fitchburg_line_schedule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2449/0397/files/human_resource_management_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7120/4245/files/60368080440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2482/5506/files/jixazefosozuxute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7481/8726/files/rujaxita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6249/2324/files/wopitokuvimofew.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 extracted file (font_00_sfnt_off00007a8f.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8F 4996 bytes
SHA-256: 88e0469c1fac59246c6257be23875b56f0328f83a263803ced6f4936a43cad49
font_01_sfnt_off00008b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8C 11028 bytes
SHA-256: 60e2fc43c127294d893964d45a0661fbe4024154cd8ce61bc94e71ca71b38fbf