Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cfa70ee5a218229…

MALICIOUS

PDF

42.3 KB Created: 2020-10-03 01:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c6167ad217a61fb602b4a61ce2585fd3 SHA-1: 2be2a7593b8a310cc11e857375d0a410829a4518 SHA-256: 2cfa70ee5a218229be64208756f7a886fd26c21bbeaa4f520a5a95025de35dc6
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=root+words+and+suffixes+worksheets+5th+grade In PDF document text
    • http://lujul.ayusewingproject.org/uploads/1/3/1/3/131397970/2440980.pdfIn PDF document text
    • http://pazomijij.randallcb.com/uploads/1/3/0/7/130776299/9367889.pdfIn PDF document text
    • http://vebodezub.foresightvisionlab.com/uploads/1/3/1/3/131398244/luwofaxuwupek.pdfIn PDF document text
    • http://vawajiz.techsmartacademy.com/uploads/1/3/1/4/131453133/925e4.pdfIn PDF document text
    • https://site-1036750.mozfiles.com/files/1036750/95324417457.pdfIn PDF document text
    • https://site-1036745.mozfiles.com/files/1036745/24952399470.pdfIn PDF document text
    • https://site-1039316.mozfiles.com/files/1039316/wafotoz.pdfIn PDF document text
    • https://site-1040006.mozfiles.com/files/1040006/niwamisasovuv.pdfIn PDF document text
    • https://site-1036982.mozfiles.com/files/1036982/nolegufofunojuradatofawat.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/d0520f32-dc2a-46ac-a101-1b7188d1c85e/tefilakiwosenewox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e67c5859-aec9-4adb-82af-09566fa995da/98409332640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99da8845-de3a-4294-aed4-93a21c091127/2664112513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/643bdba3-20af-4111-b845-e9a566c1b24f/juvanagoroja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6449/4742/files/vefikirimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/7356/4572/files/85843472964.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1997/9936/files/willard_middle_school_staff.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9727/5033/files/6048200424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3886/8124/files/html_css_javascript_interview_questions_and_answers_for_freshers.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_off00006686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6686 5492 bytes
SHA-256: 25d6bb350813c8ceecbf4b128e8ead93df849562a6eabf8b4a251b8d4bbfe563
font_01_sfnt_off00007952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7952 10060 bytes
SHA-256: db0fd12a1ddb3ee83a068fc6c53fc25246dc2af08c743d1627ca2e2d4931f4e4

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