Malicious PDF — malware analysis report

Static analysis result for SHA-256 e05f89233485cfeb…

MALICIOUS

PDF

36.8 KB Created: 2020-11-03 21:40:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 65322073d8c268c2fe45c637a6521d5c SHA-1: 482ea920c7293b97729959aa982c2de6d7a34f4a SHA-256: e05f89233485cfebcc6c607d2c6c94aad611576c8c96df1dbe1eeb804040e3b3
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://ttraff.ru/123?keyword=english+in+asian+popular+culture In PDF document text
    • https://falibapop.weebly.com/uploads/1/3/3/9/133997194/e33a1601c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416654/normal_5f9cb3aa854ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369802/normal_5f88c4098227d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384325/normal_5f984f8ab26f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406501/normal_5f98fc67823be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f99008ed3f04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f8b13317eb80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411702/normal_5f95edb535d86.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/918d0360-ec4e-4c3f-995a-f8a055811eb5/pinagatodi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34252e6c-74f2-41a4-89f8-f07264b91484/technical_analysis_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd776270-c04c-4b16-9f45-399d18d9cf1c/wupobojobeko.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_off00005075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5075 5152 bytes
SHA-256: 444d4c923a6dfcd87b9d911300ddc120c5de94beab8a8ab82ad0f2227eaf093f
font_01_sfnt_off00006201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6201 11196 bytes
SHA-256: 9354b625a6c29a1818648a327c243199a350a665f3f2279d8500fe8ea12e88e5