Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecb84bee88cf2b51…

MALICIOUS

PDF

49.0 KB Created: 2020-10-15 06:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ee2c37ce8afef36563249ed2a64f98f1 SHA-1: 5cfdf4fbd76912fe21a19471db205a3d0d37d1b8 SHA-256: ecb84bee88cf2b513a0d35258618b5876d3d59ab3eda0293642d88b0115a3344
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=lulubox+for+android+apkpure In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f87a71d6e239.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369179/normal_5f87c262cedde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368221/normal_5f877c25eb31a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5f87727761614.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/tugunari_fogeze_nezejavoz.pdfIn PDF document text
    • https://tejigenunonim.weebly.com/uploads/1/3/0/8/130813632/8869537.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/992572.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/4468004.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f87572527f35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f873349f02fb.pdfIn PDF document text
    • https://site-1040988.mozfiles.com/files/1040988/34051957261.pdfIn PDF document text
    • https://site-1040238.mozfiles.com/files/1040238/kimumalujovizilom.pdfIn PDF document text
    • https://site-1038901.mozfiles.com/files/1038901/24355771027.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/9b53ec72f.pdfIn PDF document text
    • https://waniremupamed.weebly.com/uploads/1/3/1/4/131407535/noxununaten_fubevif.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/7885719.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/7922058.pdfIn PDF document text
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/546850.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/3798349c-432c-40f5-8911-d6bc621c9412/zabafumupibakuduxere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d0853c-09ed-41ab-a532-10c42038fcd0/vujenovisonax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edb0c08d-a424-4341-a86b-538d0e1320db/27162011502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d71707ab-fe0c-4e93-8f1d-c8ac2d7ee4a6/fulaxidewetevitotovesip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34164ece-b17e-478d-90c2-9e50df7a783f/23604407696.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_off000082d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D5 5068 bytes
SHA-256: ca802d9ff039bfe223c4fbc288ce5b7b48d2d7a606b4dd09c0e209adbd734cc7
font_01_sfnt_off00009422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9422 10096 bytes
SHA-256: 4db2b532dab1451e46fdaf12d6b46541636d79dfd4ed55802e6bd403de5d28a1