Malicious PDF — malware analysis report

Static analysis result for SHA-256 80292d8e4976e69e…

MALICIOUS

PDF

49.2 KB Created: 2020-10-31 09:47:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 5d0c23edae98f9e9f17a102a16b622b3 SHA-1: 4dff58132ff08dffb0c49774c9f151a0257350d3 SHA-256: 80292d8e4976e69ed33cb650cd354a44aea39b02a616349cb0712e3f7064342b
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/strik?keyword=can+you+hear+what+i%2527m+saying In PDF document text
    • https://cdn-cms.f-static.net/uploads/4406806/normal_5f94dd6e1ca80.pdfIn PDF document text
    • https://gasogufimuti.weebly.com/uploads/1/3/4/4/134461051/4db50472712520.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374968/normal_5f9910a45a79d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kudefem/zajululu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/zolevifisisof.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/kitujalujixapenuluno.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/doxokeratawoxidoj.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/snake_bite_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7108/7007/files/94992008456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aa3997e-c3b3-45ce-a9e3-c5469538dda1/sezivuvidufokemete.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/gevuvememupexowufijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b37cf80-c798-42cd-a1ed-f41527f2830b/28207226374.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56D3 12536 bytes
SHA-256: 5c86fc16c326aa4e89c7663a3459175ff9a510d6e33c61fd829037f3041d13e4
font_01_sfnt_off00007f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F54 5200 bytes
SHA-256: 0d4385bdf57d6d60aace547005c7c72734e1022957db857bfde38b0fb29da228
font_02_sfnt_off000090f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90F7 10600 bytes
SHA-256: 52662df8717a5b780ca4cd24397aa931eddfb15fcdf8211d4604006c420fe3ab

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