Malicious PDF — malware analysis report

Static analysis result for SHA-256 def835ac8de263a6…

MALICIOUS

PDF

35.3 KB Created: 2020-11-08 01:51:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 35aa8cf0df942fbf7ec4eb053bf10a81 SHA-1: 431aa64603d689815facee9de3ada16a202ef457 SHA-256: def835ac8de263a60289e47269a4d4eac5782c23af830f4b8e46492022eb9e72
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=el+conjuro+1+pelicula+completa+en+espanol PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423427/normal_5f9ceaa16de86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421472/normal_5f9d014b6d53a.pdfIn PDF document text
    • https://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/wimina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412173/normal_5fa66dc40a9c2.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/kuwekewugi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f875c4cefaef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366973/normal_5f88688d0557e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://pazeden.files.wordpress.com/2020/11/86767518253.pdfIn PDF document text
    • https://nowikukiwego809870752.files.wordpress.com/2020/11/33122318883.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/class_1_amalgam_restoration.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/45415213798.pdfIn PDF document text
    • https://rakivoxomav.files.wordpress.com/2020/11/bavinck_our_reasonable_faith.pdfIn PDF document text
    • https://lajapadawosi.files.wordpress.com/2020/11/download_baby_boss_full_movie_in_hin.pdfIn PDF document text
    • https://nizowowe.files.wordpress.com/2020/11/midesifitir.pdfIn PDF document text
    • https://podenujo.files.wordpress.com/2020/11/potokudowajipube.pdfIn PDF document text
    • https://xurenusez.files.wordpress.com/2020/11/85721636578.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_off00004834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4834 5164 bytes
SHA-256: 15f76fdb15bd427d72a321b7e928cf6aae4a2a334f2e407b9a02f553b380959c
font_01_sfnt_off000059b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59B4 11160 bytes
SHA-256: 3b378ecfb0fc8ba8f71c2a6931f3cc4ea8d292b7dd4b460017a085a4a1be96c3