Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae0891cd1654bff…

MALICIOUS

PDF

59.1 KB Created: 2020-10-15 16:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6a2670ed2dc0bb6dab698b566da706e7 SHA-1: 16a0446c2d86254efb4b966714002df8825ff8c4 SHA-256: cae0891cd1654bff4baedf6a6c8e8f132b238368a3a87ca158f9a98218e17c76
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=dyslipidemia+guidelines+south+africa In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5f8765163b6dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366358/normal_5f8778e650dff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5f87f04d6326d.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/8742796.pdfIn PDF document text
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/litunireluwidex-xabepod.pdfIn PDF document text
    • https://dojulukasinu.weebly.com/uploads/1/3/0/7/130776790/puvixerizewatul.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/mefilanube-sijajof-nuralenutuduz.pdfIn PDF document text
    • https://roninuvanajeg.weebly.com/uploads/1/3/1/3/131379749/1058020.pdfIn PDF document text
    • https://jedarixires.weebly.com/uploads/1/3/0/9/130969076/7069695.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/sefaritonos-nukivafeka-retisebop-regaxumex.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/4befac88-5d65-400b-bbdc-689afa654c1e/valikigovefaneduxosavebut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61a303a4-45b2-4a41-bd0c-33343caeadf6/15072803341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fad8e03-7fa7-49d2-89b3-97dacaa3ec6d/43693544869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c3f50c4-7b66-44fe-b164-afa16b48d455/xatola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1283/3959/files/41238568756.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4489/5392/files/laketufadet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/6453/3414/files/knights_and_dragons_hack_iosgods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/64903298725.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/915bd39c-6bfb-49b2-98ff-5cd607c79b5b/lebaditirepogovamer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36c2f5e5-bcb9-4993-a655-2238752f6c55/56111060041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d17769a-eb59-400a-81fb-cb65e31409d0/gemunorufibofedujuxutiwal.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_off00009f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F32 5672 bytes
SHA-256: c4a6da8eecb7e4cee7129da210b80b50c468c1c3a500870ec7a4a0f9dba59d8a
font_01_sfnt_off0000b259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB259 13864 bytes
SHA-256: 3dcbbf69c00b078a05a1fdad1582d1b5c9a579412a3f76bff7ffcf7b6698bfe2

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