Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e1f90539feeafb2…

MALICIOUS

PDF

67.0 KB Created: 2020-11-14 22:03:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-09
MD5: c6597ebe06041ea913dad8f3fa871823 SHA-1: a7b7cfbe63b62a1bcdcd807a8eb4fc1ad5abf97d SHA-256: 5e1f90539feeafb22ee727eced50b649dd8522380f67ac79faeb83d7155e5149
284 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • PDF carries website-builder CDN document link farm medium PDF_CDN_PDF_LINK_FARM
    PDF contains many clickable PDF links parked on website-builder CDNs or simple download gateways together with visible ebook, manual, or download lure text. This matches generated SEO document carriers used to route users through untrusted link/download chains; the PDF itself is an inert link carrier.
  • 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://cdn-cms.f-static.net/uploads/4427498/normal_5fb0263cc599f.pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376621/normal_5f915a96343ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_5fa9057962460.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/vabogevajebimu.pdfIn PDF document text
    • https://vudizexifaret.weebly.com/uploads/1/3/4/3/134314381/gomakaxiwow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415929/normal_5f956ca97fefc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496602/normal_5faf8d04be4e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372376/normal_5f8b248e0d2cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387412/normal_5faa14d628d94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446790/normal_5fa6a0f00f378.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/wupozowefunalenem.pdfIn PDF document text
    • https://kelodulelonax.weebly.com/uploads/1/3/4/6/134644310/lomapa.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/7922058.pdfIn PDF document text
    • https://trafffi.ru/strik?utm_term=que+es+un+epimeroIn PDF document text
    • https://nutawazozi.weebly.com/uploads/1/3/4/6/134699679/8347554.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000c71b.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000c71b.bin)
    • 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 extracted file (font_00_sfnt_off0000c71b.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC71B 4784 bytes
SHA-256: 997083d2873df629c81f84f4bb9e9aa42acd486200110377c87b134dca0a0079
font_01_sfnt_off0000d74e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74E 11960 bytes
SHA-256: 13fa678d156355d5d9335f2469c1bc11be8ea4f7e2168ea90069fdf986a77c00