Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed09103ccbcf8e88…

MALICIOUS

PDF

44.5 KB Created: 2020-11-08 10:41:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 27fd4212987fe621a5ce48d293959e88 SHA-1: 33274a9629fa07f24fd4d240654e45af4ff50e16 SHA-256: ed09103ccbcf8e880be216f3987bec04219277e702ce8ead33f4c0350099c262
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?keyword=mixtures+and+solutions+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454419/normal_5fa53eb551a09.pdfIn PDF document text
    • https://zekuwatifakaxi.weebly.com/uploads/1/3/2/8/132815855/3860f838.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393761/normal_5f9b42cd088f6.pdfIn PDF document text
    • https://vovufopoxin.weebly.com/uploads/1/3/4/4/134466437/1593384.pdfIn PDF document text
    • https://gewusepisegetu.weebly.com/uploads/1/3/4/4/134492884/92352.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402706/normal_5f9142079ba00.pdfIn PDF document text
    • https://jomojakadawubo.weebly.com/uploads/1/3/4/4/134448567/sawogo_kaluritata.pdfIn PDF document text
    • https://rodekimixew.weebly.com/uploads/1/3/4/3/134314341/kogonuwumawurapu.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/819ebb2f-8c25-4ef4-9f32-563d992ab03c/77007374448.pdfIn PDF document text
    • https://giwopavaka.files.wordpress.com/2020/11/astro_del_ciel_spartito_chitarra.pdfIn PDF document text
    • https://xazadawedi.files.wordpress.com/2020/11/32024854716.pdfIn PDF document text
    • https://fenimibabija.files.wordpress.com/2020/11/kimiwakugapitufoti.pdfIn PDF document text
    • https://galitedavaku.files.wordpress.com/2020/11/41531066890.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_off00006e1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1B 5140 bytes
SHA-256: 77b9ad4c903c2b963f5f308d72e2d7b9fa1682792c4836b9d8ab53b05625f9dc
font_01_sfnt_off00007fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FAC 10968 bytes
SHA-256: bb1c0580eb1e729d6be68bf2ea8def09179952ea2889d67ee44aaefcf106b6df