Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8943cae7b8f1d66…

MALICIOUS

PDF

43.2 KB Created: 2020-11-06 08:24:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: a9216c0c1180310b1620997c714407ab SHA-1: 8fd285d1caabcf01fedb0962119cf509c78526c3 SHA-256: d8943cae7b8f1d6603290369d32a23e0babaf49b176aa724732e830f7bddd4e9
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://traffine.ru/123?keyword=ind+vs+sa+live+streaming+cricket In PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/fijuw-lotuwufavena.pdfIn PDF document text
    • https://tanifovekula.weebly.com/uploads/1/3/1/3/131379991/zejipalotidada.pdfIn PDF document text
    • https://buxenawemino.weebly.com/uploads/1/3/4/5/134581697/3653c228.pdfIn PDF document text
    • https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/c60283b4bf140f.pdfIn PDF document text
    • https://vixeroniwemeful.weebly.com/uploads/1/3/0/7/130740086/salifexitiwipor.pdfIn PDF document text
    • https://mabulibatelirip.weebly.com/uploads/1/3/4/5/134597637/73d5f.pdfIn PDF document text
    • https://duxixujojive.weebly.com/uploads/1/3/0/7/130739103/sejiliduzika-danuwefitap-sotuvakuxo.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/4354840.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371812/normal_5f996776d4796.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/c7c1f06b-369a-4c56-8ed2-3f38d843b5c0/wiramabawefumisuki.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/13991420407.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/application_letter_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cecd5529-d40a-4ff0-b9da-7e9871830668/symphonized_headphones_xtc.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_off00006742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6742 5320 bytes
SHA-256: 8db235972daf75add6f900a500305230ddcf89786b7c28e3fe94a6257072e368
font_01_sfnt_off0000794e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x794E 10716 bytes
SHA-256: c4eeafbd678e272b02d872831609f09405ede5d741c800b1c82faec1af792bc7