Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1e92e9b5c6fe787…

MALICIOUS

PDF

42.8 KB Created: 2020-10-15 14:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3105dc7d4eab4fc3c168b18ee7f42f65 SHA-1: 7a874f93ac55446b4d42914238340ad61bb3864b SHA-256: d1e92e9b5c6fe787dc7e92fd00049287847b121196c47024e4036e203f5efd30
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=alien+vpn+premium+mod+apk In PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/3067697.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/04cab5.pdfIn PDF document text
    • https://besavikeneg.weebly.com/uploads/1/3/2/8/132815808/somudemudi_mirisaxof_bivifozur.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/vibule.pdfIn PDF document text
    • https://seririgikum.weebly.com/uploads/1/3/0/7/130739922/xifetozexekaloz.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/filosom-lusiwikafese-jerupuxorukoti-novubolifunuw.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/6069273.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/6021823.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/f99449e32f852c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f87a51c3814d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366642/normal_5f8770fa39233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367964/normal_5f8763b21be28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f882e08363ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_5f87231087fe2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f874bdcf0986.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/ca83f714-7666-40aa-ab23-fa01d09badcd/dakimive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/869a1f91-a04e-44e8-b1af-94a7a5a908be/98738933207.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97c6aab0-0247-4677-852b-4514e3cc92c5/lufalufokenila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e948a035-4944-4af9-b5e0-8ef6fc0548c0/rubawomazarudux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/002d84d8-bd20-445b-a32b-d7709d977d04/vemesemogatem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8a51c0b-5d52-478f-b526-f274b6940acf/79451550004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba971cee-674b-4389-b193-25f6d8173b4f/69957998896.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_off00005e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4F 5040 bytes
SHA-256: be8a4b752109ab68d7f3f9a05a049151b26fad81a1490862c1c5661c4927a928
font_01_sfnt_off00006f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F60 15068 bytes
SHA-256: d5d10013853d76c15240e5bff7b258414f05654b55383c75ac52bdd9a69b38a6

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