Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec72208cd43bd0f0…

MALICIOUS

PDF

35.6 KB Created: 2020-10-09 20:52:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 709d1e59b50b18fdfbeac6234309f722 SHA-1: 537adddf4a5ee8db44fff70c9980f718f38bca5e SHA-256: ec72208cd43bd0f02b930290119d34bee23448ff1f09e2aba4f8f7508e5131ba
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/strik?keyword=los+angeles+harbor+college+admissions In PDF document text
    • https://site-1040359.mozfiles.com/files/1040359/bisosepomoduvokeb.pdfIn PDF document text
    • https://site-1039610.mozfiles.com/files/1039610/99846154896.pdfIn PDF document text
    • https://site-1037894.mozfiles.com/files/1037894/47876649678.pdfIn PDF document text
    • https://site-1044294.mozfiles.com/files/1044294/90217733556.pdfIn PDF document text
    • http://files.northernbugwear.ca/uploads/1/3/0/9/130969195/93543.pdfIn PDF document text
    • http://mebuwimak.totalfootcarenrv.com/uploads/1/3/1/0/131069934/topasiwolobapuri.pdfIn PDF document text
    • http://goxak.franciscoriosanderson.com/uploads/1/3/2/7/132740978/7710255.pdfIn PDF document text
    • http://files.blueframeart.com/uploads/1/3/0/8/130813827/vamumip_zexikosasoxunan_wubowoworikixav_nopifuliwen.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/1/0484/7897/8210/files/3.3_energy_flow_in_ecosystem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5063/1319/files/govazeweg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9272/0798/files/odd_fellows_flag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2360/5153/files/98666561715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9797/2629/files/18541123404.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6842/2309/files/isosceles_right_triangle_theorem_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0298/9208/files/36437253549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2716/5092/files/shared_knowledge_tok_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7876/2140/files/12214015339.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CA4 5436 bytes
SHA-256: 18dfbe78830beac57c82a73979c10f596b423cec236014e42be0ea3aa952f65e
font_01_sfnt_off00005ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF1 9956 bytes
SHA-256: a2dce01a3b3ea6ae6b004ea18c809912c4a66c1fc13d97ff84cad72c0b5366ce

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