Malicious PDF — malware analysis report

Static analysis result for SHA-256 21e21e2965eafcde…

MALICIOUS

PDF

41.9 KB Created: 2020-10-02 07:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c99bbdf5f6a3730e032975b7babb1be2 SHA-1: af48758acc3968188ec9d1437b92afcff9ba5381 SHA-256: 21e21e2965eafcde5b122f9f8fa98362f54ee2309581936d85f09329b152e168
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/strik?keyword=aparatos+de+ortodoncia+removibles+pdf In PDF document text
    • http://files.lampleylaw.com/uploads/1/3/1/8/131856071/beparizesos.pdfIn PDF document text
    • http://tadavad.anniepfluegerphotography.com/uploads/1/3/1/4/131408061/ramupesutox_rukipezux_dirosox_rakenawexozigu.pdfIn PDF document text
    • http://dawuxejop.tavisdupreez.com/uploads/1/3/1/4/131438304/migakiwutekufalawez.pdfIn PDF document text
    • http://files.sourcejuicery.com/uploads/1/3/1/4/131483383/bitikonofem_dobaxulebum_pokuj.pdfIn PDF document text
    • http://ridijit.sjeliz.org/uploads/1/3/2/7/132740214/837944.pdfIn PDF document text
    • http://garufaz.cherryhart.com/uploads/1/3/1/4/131438405/vosojo.pdfIn PDF document text
    • http://files.adamswellscrisiscenter.com/uploads/1/3/1/8/131871852/3e0e7.pdfIn PDF document text
    • http://files.spanishoaks.com/uploads/1/3/2/7/132710748/topig_bufuxufep_suzusuwupenagip.pdfIn PDF document text
    • http://files.jakemasritattoo.com/uploads/1/3/2/7/132740949/reranibigavu-rosiweza.pdfIn PDF document text
    • http://files.sectarianreviewpodcast.com/uploads/1/3/1/4/131455621/2537506.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/1949e520-f4f0-4adf-b925-9a876a3a4704/86311615926.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/476aeba7-df1d-4b41-a8e3-216a77d62183/43055322901.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_off0000633b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633B 5488 bytes
SHA-256: 5e9968e8172709eff5cc4ab013c8474997ae831aab1e607ce98ff45a2e64f1a3
font_01_sfnt_off000075d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D2 10716 bytes
SHA-256: 219092e70cbd9f68d7b70dc5ca03d3c768e8a1e057f51f7a71f2fd8de8f3ad6d