Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf995b030f82f21…

MALICIOUS

PDF

35.3 KB Created: 2020-11-09 14:21:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: fe4904173f9dc29e9bdfafefce66b0db SHA-1: 3cffbb74c23bc8859b08f687c9e5d75cdf7e91eb SHA-256: ebf995b030f82f21cf16550b5d8d28e96c09e3c00d037ab03b224777b1d7d788
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/strik?keyword=calories+in+3+oz+grilled+pork+chop PDF link annotation
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/fefujewetawasozokadu.pdfIn PDF document text
    • https://tewodoxes.weebly.com/uploads/1/3/4/3/134368692/8411532.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/6534308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393483/normal_5f8fe2afaae41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460477/normal_5fa4a82579a2f.pdfIn PDF document text
    • https://vaforiduzaxofa.weebly.com/uploads/1/3/4/3/134367440/3121036.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370064/normal_5f98c9aeb85cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374366/normal_5f8d190637784.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402933/normal_5f9535114eb5d.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/lanubili/lekiwededewode.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/super_regional_carrier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b81f3c3-ccc2-462b-b49f-a2e122e4e6f3/duxadijubokijinukiv.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/action_bollywood_movies_netflix.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_off00004b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B37 5516 bytes
SHA-256: 32f17060347f8eeaae8d79fbda3b2f36efe2cff19ff8049c25004235bf78ba9f
font_01_sfnt_off00005df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF4 10228 bytes
SHA-256: 9e7db70c3275c33e31908123fd6046ff84891381aaa19ff977787082442e72b0