Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec7fe5d38c8dcfdc…

MALICIOUS

PDF

69.6 KB Created: 2020-10-25 17:34:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-19
MD5: 2e26419afdb756a2cb196cf34fb5d87e SHA-1: b86f7f912b50d9d6e2a05d3e8d79629237e94569 SHA-256: ec7fe5d38c8dcfdcb3086a51694f152d2cfe6c8e8d518ae4332a9a8069df1988
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://ggtraff.ru/strik?keyword=wild+mushroom+identification+guide In PDF document text
    • https://denalozi.weebly.com/uploads/1/3/0/7/130776502/5819340.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ligewajinaxi.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/lejizu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380523/normal_5f8bd830b9697.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373788/normal_5f9469915dada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384035/normal_5f8ce53fa9b21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416923/normal_5f95028feb9ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f882d9e6134b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_5f934c1345058.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368226/normal_5f87817c17c18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374839/normal_5f8c6ff6d7db8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384468/normal_5f95159f385c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f8f9fcbde79e.pdfIn PDF document text
    • https://murudogukezopo.weebly.com/uploads/1/3/4/3/134320821/3652889.pdfIn PDF document text
    • https://jizonuwuko.weebly.com/uploads/1/3/0/8/130814311/wedit_bajojabo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0488/3759/1205/files/orijen_six_fish_feeding_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6980/0089/files/airports_near_hartford_ct.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7481/7693/files/john_lewis_sacha_sofa_bed_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1bbb062-20a9-4462-9190-f67d290f3526/28188546736.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/124b01bb-bf38-496b-89c1-ea390999c0ac/pusevexafeseve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e478015d-1c72-46a9-b717-887006ab6a62/zusobatul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fdbb0f2-04ca-44db-a2a6-42bf97762edb/90390112786.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC343 5328 bytes
SHA-256: d43d969c6a9c2d010f9d9400ff72c0ba1b813ea740851245fda980435a03df81
font_01_sfnt_off0000d53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53F 11084 bytes
SHA-256: 70b53dc191bd02005eab0f5513f24d67cf1bff7cccdfe68fbc6df8eddb3fcc4a
font_02_sfnt_off0000fa51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA51 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2