Malicious PDF — malware analysis report

Static analysis result for SHA-256 28c43a6504a3df40…

MALICIOUS

PDF

41.7 KB Created: 2020-11-05 01:23:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 51370dbaae1c7374736d3da159a6bba8 SHA-1: f9da30cf1a3a463bda21b40c78a7bb3ddab41d6c SHA-256: 28c43a6504a3df40c646439d0ae418cf268526684c4dc2511a261bddca97af7e
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://cctraff.ru/aws?keyword=download+torrent+game+of+thrones+s08e06 In PDF document text
    • https://fawibilewitowo.weebly.com/uploads/1/3/4/5/134585577/5ffea18459f0.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/binadubedexoxizij.pdfIn PDF document text
    • https://zosopomejunij.weebly.com/uploads/1/3/4/0/134040517/4c2eda98be23c.pdfIn PDF document text
    • https://lifotuvuzaraxur.weebly.com/uploads/1/3/0/7/130775275/lezomeredodizeze.pdfIn PDF document text
    • https://rexuxoxef.weebly.com/uploads/1/3/4/0/134018301/bajukosupu_nuwux_najotuluj_kabotez.pdfIn PDF document text
    • https://lewetidol.weebly.com/uploads/1/3/4/4/134462927/5291291.pdfIn PDF document text
    • https://zeginuvo.weebly.com/uploads/1/3/0/7/130775519/dipizigisexez-bemoguduponota-valenojod.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/wijigomofiweb_lotitosede_jukis_dirum.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/aea14f.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000618d.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000618d.bin)
    • https://uploads.strikinglycdn.com/files/224f78d8-7e47-4fc1-bd9c-4b74032f3b0d/zadizetediro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0462/5579/files/49807105412.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b590cb6-e90a-4d0a-962a-c7ba140c2fce/59926632166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7115/8949/files/88568996397.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 extracted file (font_00_sfnt_off0000618d.bin)

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_off0000618d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618D 5900 bytes
SHA-256: 6c2bbcde46ed6a332602d68d71e20c8f7f917d7f92a2deeb0d4db81df926ae7b
font_01_sfnt_off00007590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7590 10776 bytes
SHA-256: 9c79275691932cabb38747bc3d0eddbf038f3058ee50665dfda17fc3ce118169

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