Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a586dd4db678ede…

MALICIOUS

PDF

51.4 KB Created: 2020-11-09 14:58:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: da7679161abbcde1de9fdad4118d175f SHA-1: bf1c2ba7ca90a67e316931f75c677da67fda1fa4 SHA-256: 6a586dd4db678eded616c121acfcf5adf42b98f60c1ec40505dee14024e68ea7
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://traffking.ru/strik?keyword=clark+county+nv+voters+guide In PDF document text
    • https://geredape.weebly.com/uploads/1/3/4/3/134349068/wozonunavenivem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370746/normal_5f8a8c9b68f1e.pdfIn PDF document text
    • https://lelewamopubexab.weebly.com/uploads/1/3/4/3/134324934/rigubabedelowarina.pdfIn PDF document text
    • https://zumavekuganupa.weebly.com/uploads/1/3/4/3/134366180/mibigom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374379/normal_5f8c55b3d57b5.pdfIn PDF document text
    • https://mawoluji.weebly.com/uploads/1/3/4/2/134265904/5769095.pdfIn PDF document text
    • https://kirugivedipabaw.weebly.com/uploads/1/3/4/4/134464293/a5d3e.pdfIn PDF document text
    • https://kipujoguburaza.weebly.com/uploads/1/3/4/3/134321983/9303854.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/832302.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/zuvefusu_tewojawowebav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421341/normal_5f9bb8cf35a5b.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/1ede0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374953/normal_5f9999dd8cfbb.pdfIn PDF document text
    • https://gavawujag.weebly.com/uploads/1/3/4/3/134370084/5373073.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390350/normal_5f94f66a1ed36.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000899b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x899B 5236 bytes
SHA-256: 47cdf6701fbbc0467430a1ecb5e56832d8413a96034179eff87376a478ee6fae
font_01_sfnt_off00009b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B87 11180 bytes
SHA-256: 5c36df3ad282e4f31680ba699011689eb0e12f1af7686072093534b91e7a70e4

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