Malicious PDF — malware analysis report

Static analysis result for SHA-256 db6cd6dda8447deb…

MALICIOUS

PDF

46.3 KB Created: 2020-10-03 13:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: dc5b17e847f61d9bbf02411e42d24074 SHA-1: f96e4ca9c73f39ea9e8813f2889b5e008b8093a0 SHA-256: db6cd6dda8447deb852ae8afe52de9e817d23c4e9f29b4e13e11d08f7724e139
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://ggtraff.ru/pify?keyword=bonneville+shoreline+trail In PDF document text
    • http://velusapu.orchardviewchoir.com/uploads/1/3/1/1/131163927/nururan.pdfIn PDF document text
    • http://nijela.bettyscountrykitchen.com/uploads/1/3/0/8/130813554/ginapidumiv.pdfIn PDF document text
    • http://files.bariatricketo.com/uploads/1/3/1/6/131606290/4545963.pdfIn PDF document text
    • http://files.debsharratt.co.uk/uploads/1/3/1/4/131483281/kifopivajibesobe.pdfIn PDF document text
    • http://resofonun.willowsandsageflowers.com/uploads/1/3/0/8/130874388/vifof_rowofido_kasolib_bejisunagax.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/1/0431/1256/2849/files/johnsonite_rubber_cove_base_warranty.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5009/8085/files/pabebijabede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5347/6759/files/a_howling_in_the_woods_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9363/8822/files/55727928439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7768/4379/files/murphysboro_middle_school_dress_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/067ff65a-a347-45ba-a8b9-9ffc9427759e/nesapivokosaxasilamuvuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6913f684-1ddc-4465-a099-d388dc7daf4b/tafuxebukarowodorotuwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/001ee0c6-4349-4771-9523-1f3799970334/21959859052.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e907f658-26e3-4b4d-b6f5-2f9c4a89c950/taretudiwukala.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_off0000760b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x760B 4884 bytes
SHA-256: 4543b5fd3621850038e770454acb7a6cccbcecf634637cb7b9b1e0937230012a
font_01_sfnt_off000086a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A1 11392 bytes
SHA-256: 59929af2a5de7ec6d97e3d13bfdb8dfeb82ef542b81811b6ab9942fa02d2e5d0

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