Malicious PDF — malware analysis report

Static analysis result for SHA-256 defc3808c7ae4ff4…

MALICIOUS

PDF

40.8 KB Created: 2020-10-07 08:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 47443db3272e9d604b6037483f7bc8f5 SHA-1: f808d4210cb806156c0143e210d355498970a2e2 SHA-256: defc3808c7ae4ff4fd18a4f1ae84ef10c66587bfe9b013fa6e0f0ae7307f83a0
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/pify?keyword=swans+island+maine+hotels In PDF document text
    • http://mugejaja.odapc.co.uk/uploads/1/3/1/1/131163658/pupufopuvexupugeke.pdfIn PDF document text
    • http://files.friendsofcookforest.org/uploads/1/3/1/4/131406827/21a4cd951.pdfIn PDF document text
    • http://files.normansglutenfree.com.au/uploads/1/3/0/7/130738974/xonunow.pdfIn PDF document text
    • http://sajuse.filmworx.org/uploads/1/3/1/4/131438096/natonutepa.pdfIn PDF document text
    • http://files.standardsportfolio.net/uploads/1/3/1/6/131637372/8c1a2747.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/1/0433/9020/6101/files/library_administration_and_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7881/9735/files/95059037403.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7355/1001/files/xuzavujine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1624/0807/files/74961761891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0714/7162/files/t_rex_campagna_dash.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6f55417-c6ba-4cfd-96e5-6af95d40e52a/rimeranovikox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bbed804-1d8d-4602-ad14-1010e6a16302/33652357757.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f30cdb03-bc01-43a3-8942-726ac113243f/jozaruwapibodidifaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75abc16c-e7de-467d-8da9-83d6b482c09d/55581480422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfc9db57-5426-4570-af44-ba59be0573fa/sosonigoteveto.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_off00006326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6326 5164 bytes
SHA-256: ee79ffcba33c598858dfcbf96d331e4c280cf6cdf0adea7ecb6eb74e748c7e72
font_01_sfnt_off0000749c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x749C 9884 bytes
SHA-256: 6218ec458f63393116e5b112140ddf1c1e5e1d7c4172d9574e0cfcb42ef306ef

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