Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d523e96b562d022…

MALICIOUS

PDF

44.2 KB Created: 2020-10-15 08:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 1876d9120ffe1b096712ff63196a78ad SHA-1: 69560443b8dfeb8d88ca99267aed85393c42a3f7 SHA-256: 7d523e96b562d02219c8fbb76c8f66a735962c900b7b1ecbbfbb3a033b03a4ef
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=nfc+reader+android+open+source In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369174/normal_5f87a86271bbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f876cd945b51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_5f871e595312a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5f878dd535399.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f87c8cc55de4.pdfIn PDF document text
    • https://dosedupuwosiwoz.weebly.com/uploads/1/3/0/7/130776272/278ae4fa7b72c.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nimemoroligamaj-tafixidupara.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/44d87feaf8ee.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/08e194ef7696ae.pdfIn PDF document text
    • https://rutaluxunenore.weebly.com/uploads/1/3/0/7/130740368/3eae1cee9706f5.pdfIn PDF document text
    • https://dojulukasinu.weebly.com/uploads/1/3/0/7/130776790/livefoze.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/pokobu-pidoror-pekirez.pdfIn PDF document text
    • https://tejigenunonim.weebly.com/uploads/1/3/0/8/130813632/6812471.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/038885c85ecf8f0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5015/3622/files/bukagagiwadebezimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9094/3901/files/skyrim_the_whispering_door_good.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/864513ca-81ea-45b8-b7af-3554558922a1/53921745140.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f063f7f4-bac5-452e-9865-dd598d8c5c5a/88764540314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/def21dfb-ed58-440f-91f4-b88d3ea34d8b/nakowogibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46c4fdeb-8e4d-4f88-99b4-0a9063152434/resesukatixanadanafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebf577e2-da79-47ea-9c02-7e3a133e2397/josamakumizegazuv.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_off00006500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6500 5084 bytes
SHA-256: ed7cb44b792dfdddac509b73c85f1a4d7b9086d5aa9422a5efef260aab254c78
font_01_sfnt_off00007654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7654 14084 bytes
SHA-256: 9ab16ba5e5ffeed84a63079f2d9288cb1ac23cede20f186e4d6ff993b4a73f3d