Malicious PDF — malware analysis report

Static analysis result for SHA-256 221059f3cf9e054a…

MALICIOUS

PDF

52.3 KB Created: 2020-10-07 09:51:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 427c5f672ab50d851f5ccb72554f7d4d SHA-1: 5ddb4aab9a9c6296947c3a0489b0327d32d1efad SHA-256: 221059f3cf9e054a4943d6356a92f2f7c8b465aaf46d1fa6e44e660007b55f0f
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=ordinal+numbers+english+worksheets+p In PDF document text
    • https://site-1037125.mozfiles.com/files/1037125/gusagotatiwusa.pdfIn PDF document text
    • https://site-1040329.mozfiles.com/files/1040329/5206195624.pdfIn PDF document text
    • https://site-1038519.mozfiles.com/files/1038519/43966305803.pdfIn PDF document text
    • http://zudefik.satxinspector.com/uploads/1/3/0/8/130814070/1419345.pdfIn PDF document text
    • http://files.marypoppinscc.com/uploads/1/3/0/8/130873828/sitetu.pdfIn PDF document text
    • http://files.mindbodyevolution.org/uploads/1/3/1/4/131437491/moteg.pdfIn PDF document text
    • http://sivapug.inclusivejourneys.com/uploads/1/3/1/6/131637339/7441400.pdfIn PDF document text
    • http://files.ejacts.com/uploads/1/3/1/3/131384018/givebivusunilujogoj.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/06252e27-3c52-4c76-9f5d-1df7f7b4579c/vakikumepisaret.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/511646c1-6bb6-4469-aa16-5714475d16c9/52024686789.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/595db39f-e15e-4498-ab5c-877d6c43b769/sawozanabizolun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c8203aa-eebb-4c4f-9d0a-5667756104f0/31363678275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f08951b-d850-4bbf-85ab-448aa0098cc8/54453106245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8af5c6b0-7617-4a43-8389-a5b05f0f97d7/51983909912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feb8dca9-8637-4406-9d5a-eab63bb13b2e/loletefedopikaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ece37d53-0c28-4ecc-8d5e-aeec399951bd/48273590826.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a797504-8e44-414f-8f2e-9115dbba9619/diforekovelozebutojage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/611dd994-ac79-4fd0-a957-6ddf628f5670/16368501689.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000a83f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA83F 17924 bytes
SHA-256: 16efbbf6931d044c68e30372434c19992f93a237da58f829ec5c5c66b05b8f8d
font_00_sfnt_off000071c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71C6 5696 bytes
SHA-256: ff353606bc25ca49e04619a9690cb9794fbe3aae999927bab3d24c25c700fb83
font_01_sfnt_off00008504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8504 10260 bytes
SHA-256: fc3ac1bbbf763649e46b2be484d0c047df7aa3702234fe1b842e84830cbab0df

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