Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed317ed2f4dfa1d7…

MALICIOUS

PDF

47.7 KB Created: 2020-09-30 09:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: abd54c8ece9c47e30fc9dcb83bceab22 SHA-1: 6b2a3e4cb9a8f5e3e16297fbf68cc6ca771271a6 SHA-256: ed317ed2f4dfa1d75f665a25ab343eea20862ea4aa9488aae8418348f0b1ab7e
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=archimate+2.+1+specification+pdf In PDF document text
    • http://dobika.valleytea.com.au/uploads/1/3/1/3/131383790/jurasa.pdfIn PDF document text
    • http://fopom.bridgeportcf.org/uploads/1/3/1/8/131871787/1802088.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/1/0430/5240/0793/files/nukukad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/20000332523.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9095/9766/files/deliraxojuletuwuvojozuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ed484f1-eb7d-4806-b76b-173569f80ca4/59206598237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61b71d40-ef52-4ac8-b612-074724aad359/nobigago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2de0393-a7af-4bc4-80b5-3ae284585f7c/14125472940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbefa34e-0a8a-4c3f-974e-1dc4cb8ca7d4/depixasejataj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77ac7169-bc87-4ffc-9c0d-04896c5aa87b/vekaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88af9965-9d91-4efa-b40c-6b188f6d5d65/gewovar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18430a04-0614-4f32-a268-0b3bbc226469/87351688156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b356ba76-5549-466e-a887-e63ce24b18c9/fonomopep.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_off00007ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB3 5568 bytes
SHA-256: 1bdce29cd143b971a801fc909d2e945d927edd5371d8bd7b2775d2edf86651fe
font_01_sfnt_off00008d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D82 10856 bytes
SHA-256: b430d12c2132710b35292df2cc73cc073776b1bb48d76501f05b2e09b77a7275

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