Malicious PDF — malware analysis report

Static analysis result for SHA-256 70c98ff8ce0c90c3…

MALICIOUS

PDF

52.7 KB Created: 2020-10-16 14:43:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 23de0e88233fcd32636b131698e7c0dd SHA-1: 95b79d2e95b64fcd5ff1f3ecc7125e0767a39742 SHA-256: 70c98ff8ce0c90c30ee797c0233193ce28143abbf9d0974345ec0124a8025909
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/123?keyword=holmes+ultrasonic+cylinder+humidifier+hm411-btu-fca+instructions In PDF document text
    • https://pudukodup.weebly.com/uploads/1/3/1/4/131407572/9f1ac3284bbb.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/zosorunoremuxuza.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/fibawubaxavuvabu.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/wirexanusir.pdfIn PDF document text
    • https://zisokilusativ.weebly.com/uploads/1/3/2/3/132303079/e0c417116e82b29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f8755ae7a911.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368971/normal_5f8943e59b4ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369905/normal_5f89267e699e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368496/normal_5f89070618e3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366625/normal_5f871c2d9ba09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367300/normal_5f87609b4f471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_5f882f0828544.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f87bf24a324d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f86f93e0ff3e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/afdc2dbc-e7ef-42fb-b259-1b8684eea858/vibexo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed340bed-c54c-4264-a25a-4c4a6e99ac4f/69361526060.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93e14c03-4d0a-4cc4-a7fa-75bd1cc519f0/luvarebokafesolowulamax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/422d60ca-6716-407e-9587-fa50fa254740/xiwuzabivexopewepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e35c2452-91c3-4eea-b0b0-26f13dbc245c/81612257463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5712/5278/files/beyblade_shogun_steel_gingka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8882/2950/files/57172026401.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_off00008ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA7 5636 bytes
SHA-256: 7ea6bb133a2fc1fc19b9075accc18e381302756d3206185397db1c3c491a5a10
font_01_sfnt_off0000a1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1B6 10264 bytes
SHA-256: 2ef77d28c492b323cd60340e3592a8515343e831d70bee828fefcc17dfdebc56

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