Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cebd6c1954bf061…

MALICIOUS

PDF

43.6 KB Created: 2020-10-16 05:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 9a1170854262a5ab2bf7e64809931df7 SHA-1: fdf471fa91cfa19952dac06baf8992d7c411b1ce SHA-256: 7cebd6c1954bf061352c110c565e8f5e9d17e480f8bef4fc8b5e780f62ca6f60
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=%25D1%2587%25D0%25B8%25D1%2581%25D1%2582%25D1%258B%25D0%25B9+%25D0%25BA%25D0%25BE%25D0%25B4+pdf+%25D1%2587%25D0%25B8%25D1%2582%25D0%25B0%25D1%2582%25D1%258C+%25D0%25BE%25D0%25BD%25D0%25BB%25D0%25B0%25D0%25B9%25D0%25BD In PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/22c1e412c2ef06.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/1673329.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/787520.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370064/normal_5f88d0b675700.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_5f87f7032a916.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369168/normal_5f88d02d7e4de.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/4513891.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/e71d5b95e089.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/1/0454/3050/5628/files/moxemufuledadajoke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/0887/5422/files/elements_of_movies_what_makes_a_movie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4674/3449/files/pixigomiwawij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01f661a0-ac87-4690-b7d3-34f8902d84dd/72132199831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a57a6433-6a30-4aae-911c-4fa920b570b7/sapiwumolufozutezuxaxup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd436f2d-9628-4454-b337-4f9ada395987/magalaluwufitobesedo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d2cb3fb-6ad2-46a1-aaa3-f392db271985/kolazolasiwuwenikobalamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6603/1257/files/cellular_respiration_worksheet_biology_corner_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9650/6521/files/11537715325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8945/1425/files/moferuremasonolipugawexar.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_off00005adf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ADF 5788 bytes
SHA-256: 0b3c7111e36b3fffba5dbcd45a35e91d35020ebbb0096cdb27d55f2c50704c2d
font_01_sfnt_off00006e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E37 15772 bytes
SHA-256: 730fae3afea4ff230b6c2407e7d923401ee3cd74ed771cf71c9262b275d0f41b

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