Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc809aa40f294e53…

MALICIOUS

PDF

67.5 KB Created: 2020-11-08 16:40:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 85c51c31ba082956708fa884587ce0e7 SHA-1: 0a2c64cab8f4cad72df85af618b38af19b5e59d2 SHA-256: bc809aa40f294e53df280d28c01225da1b1066efd7f15ccaeeb80433071737e3
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://traffine.ru/123?keyword=famous+people+in+the+southeast+region In PDF document text
    • https://tuxitusonodedin.weebly.com/uploads/1/3/0/8/130873989/nelanibopomen-jinojunuwov-xuxeba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_5f88353185ce7.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/1472219.pdfIn PDF document text
    • https://diboboxu.weebly.com/uploads/1/3/4/3/134330346/7495711.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369793/normal_5f89c72398530.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407576/normal_5f942eadaefd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388818/normal_5f9c435d5e6e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452374/normal_5fa7407258346.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://lamopute.files.wordpress.com/2020/11/walmart_assessment_test_answers_2018.pdfIn PDF document text
    • https://dilopipo.files.wordpress.com/2020/11/demetivudaxakoleze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ee42bb9-39ae-4ba8-8066-def5978d41cc/25753600839.pdfIn PDF document text
    • https://vakonowar.files.wordpress.com/2020/11/laravel_interview_questions_and_answers.pdfIn PDF document text
    • https://bofasigel.files.wordpress.com/2020/11/19641894286.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/020287d9-d444-4369-aa0a-2fd35aede3e2/proof_of_time_slips.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6552ce8-4b95-4bdc-a5ab-ae6632cdc180/83021347685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b359f139-4357-4e84-8eed-0b5131712e8e/votobozarero.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_off0000c7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7DF 5188 bytes
SHA-256: 9697a2971797e631a13ff8e284bf0a0cde0dc6816bb9f9503ffb6be93e32f39f
font_01_sfnt_off0000d95e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95E 11568 bytes
SHA-256: 214f6d2deb342063e36f59af017312157337cb5a0345b1a304125ced169165d8

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