Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ceb073c790cd113…

MALICIOUS

PDF

35.1 KB Created: 2020-10-25 03:44:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 1e9cbfdd8d8b44d43565b8e0d0f111ce SHA-1: 006fff36bc761d392fd8e4e1ef74e73ec167d6a1 SHA-256: 2ceb073c790cd113419df97f562fce0d001229e558de6dbf23ff434297a772e5
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/123?keyword=lippincott+biochemistry+pdf+5th+edition In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f937325688ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368747/normal_5f893258e582c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367304/normal_5f93ddb3342db.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/wavumopeduwi-vivugopofujudoz-lixepufinuza.pdfIn PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/nalamexu.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/pibabopuduj/andrei_tarkovsky_libros.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/crowding_out_effect_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3008/8342/files/gutorazam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2622/7093/files/terusuxor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2755/2661/files/sifipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7109/8020/files/lebadizejiferubotajopejow.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/jazz_guitar_arpeggios_patterns.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/aprender_aleman_completo.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/tabagismo_e_cancer_de_colo_de_utero.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/number_worksheets_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/agriculture_problems_in_pakistan.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_off00004a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A49 5460 bytes
SHA-256: 635cf2557a685fb6e6848a801517331057b7c96ed1ba089f409fad32adc6f56b
font_01_sfnt_off00005cbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBD 10176 bytes
SHA-256: 571cef38db095d76ff1ad3653912d4625784e2959f05b75ce0053938c1f26e4d

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