Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff6726dc5bae4483…

MALICIOUS

PDF

43.8 KB Created: 2020-10-20 16:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fa54ddeefae887bcc6a11d9cc5b7fec3 SHA-1: 51dba5ae60c8f3dcd706b7041d92cd782f5690e8 SHA-256: ff6726dc5bae448337403f698d97a58d2ebaa0adf84cbf3341a57fb54c194e49
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=fences+full+version+cracked In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375531/normal_5f8b7fc376e18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387924/normal_5f8dfeed51f36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381095/normal_5f8d40b59fc0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387933/normal_5f8d0468548f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f87307b8e896.pdfIn PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/nefofelutitaw_nesabemexubufo.pdfIn PDF document text
    • https://jusujonolixutuw.weebly.com/uploads/1/3/1/3/131379247/5c06f68b65.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/24c86.pdfIn PDF document text
    • https://vawotitalu.weebly.com/uploads/1/3/2/7/132710714/wikodo_zufem_konujirulobuji.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/333677.pdfIn PDF document text
    • https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/1164057.pdfIn PDF document text
    • https://xuwuperozaposa.weebly.com/uploads/1/3/2/3/132303395/91fca43aea675.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/vopovajibupoti-goxufomef-rufijagotebi-susukeveribu.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/df8db08c-20f0-456f-a5c0-739933244c73/41753747034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd97e6f-4edb-441f-a884-0c651a858c50/vetopubukimazukuto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69654c0b-9ff1-4683-b98c-75f73c556601/volejuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f762b346-560e-4b39-85a8-48bc8494eaf1/8944229466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e123f6-5b94-4bf0-bf7a-ce2f046b09be/loravepizowavatususuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d174183b-8b19-45bb-8aaf-99aeb3360d7c/15007886377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/653d8426-8bd0-4d04-8aa0-b98b5ce8d65c/30503376613.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4da7af1f-4b0b-4fe3-9586-6ebc1c31e05f/46591353176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aca7ea03-311d-475f-99f2-cc85bb108994/23523140823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8435158c-c44e-41c4-a5dd-c03b740d4a28/xifatovogurexobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8f19789-b305-4faf-a094-d21bef73ab18/65762708877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0b4fb71-d21c-4aac-9536-884482f76c7a/jarojop.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_off00006dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBB 5092 bytes
SHA-256: 93f61d890d2884a2c7b3f41dc29190e6cb6a5e57aafc47ee80a809b875add9fc
font_01_sfnt_off00007f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1F 10280 bytes
SHA-256: e35cf2b7b706ef4d0eb37b35791e39f5701c8192dcff33c7d96a64516c7686d1