Malicious PDF — malware analysis report

Static analysis result for SHA-256 16b34b9de2357b93…

MALICIOUS

PDF

41.4 KB Created: 2020-10-15 21:59:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: dedf58ce9030e02ff3b6167ce89acef3 SHA-1: ea1b8c0e4bbb07f2e05ae73c1814b1b9b02e3dae SHA-256: 16b34b9de2357b935cf4f9d0d00d7f14c295ea9a95ae45f278e56302bddc4b6a
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://ggtraff.ru/123?keyword=games+2020+new+download+apk In PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/domovodibaposix.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/rotizizalipi-xulejowo-wegevok-xutijub.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/ef82e0d.pdfIn PDF document text
    • https://site-1043793.mozfiles.com/files/1043793/66191162313.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/xenote.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/nusilekaz.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/80e56d498663.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/442b85f4-72be-4bc8-bebe-5f8533368de7/34154632896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fb92948-b2ae-4e0b-bf25-181749ee3834/49027873503.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f03ac378-f2b8-4fdf-8aaf-3874d3ce8c8e/83075579012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b40a787a-ab5f-44f9-88f7-770564e024be/49088407555.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b69b00c9-ba7a-44ff-b75a-28a780d35231/975598942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/882febe9-45dc-4ef0-b014-7d518443c88b/43179314508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b31af649-d676-4cd5-88a4-ec347c239616/80382984334.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b58a16cb-6282-4c5b-9b0f-dfce254d9956/pelizuporewedoruvemidaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bc7df84-51e2-4ba5-84aa-91ce5e2e8fcf/61773219391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61934ec4-84fb-4d01-892f-49c57443ed43/47813438844.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_off00006435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6435 5472 bytes
SHA-256: 6b73d68a22832ea4a51d4ba73ecc6e66b2f2571a58d4b0c5bf22368779098a38
font_01_sfnt_off000076dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76DD 9880 bytes
SHA-256: 167e04b3747b939393abd4e89655830bcfc07200ce74cdc356ed2d9b94bf2a63

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