Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7cb7cda4835f879…

MALICIOUS

PDF

38.3 KB Created: 2020-10-15 15:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0c6bccf50633a60edf7d9f47a906d2f7 SHA-1: a66ffff01ea1855db083a312813862600bd2387d SHA-256: f7cb7cda4835f879aa8975bed3dd132789e9b43a7b70bc55141ff3f7e5cb3a59
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://gettraff.ru/123?keyword=chemistry+unit+8+worksheet+1+mole+relationships In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f8706bc28e72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f872cdd359d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f873cb45fa85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368745/normal_5f882c3081ca0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_5f8758a076c3c.pdfIn PDF document text
    • https://site-1037059.mozfiles.com/files/1037059/64177128349.pdfIn PDF document text
    • https://site-1043328.mozfiles.com/files/1043328/vogojenure.pdfIn PDF document text
    • https://site-1044309.mozfiles.com/files/1044309/retoziwobolekimo.pdfIn PDF document text
    • https://site-1048473.mozfiles.com/files/1048473/59324989329.pdfIn PDF document text
    • https://site-1042988.mozfiles.com/files/1042988/gigetufetuguzararogofa.pdfIn PDF document text
    • https://site-1038825.mozfiles.com/files/1038825/midore.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/b1244d1e-59c2-4658-a58c-db6ca74ff216/gudugaxumawawowuluve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccc80709-6b61-4bc1-a833-f87ab3908403/87975185852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fccb32c9-c8ec-475d-aa70-40e56e92c8bd/54945506877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66c2473f-3cef-4f59-bd0e-c9793f2fe1f0/4361850038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/879d436e-d7be-4b67-b05d-70112ceba51a/76752565371.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfce2a37-47ee-4b00-8b0a-7e8eca4fd8e3/jinarisasuzutalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be4d0be3-a7d6-458d-9d3d-12e04177f7e8/bodumititoriwomos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8804588a-0008-4c9f-b6e2-650374825e03/72054617820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00ce072a-9e27-4128-a4a8-dd4ab858c8e0/kijupiwinonutapupofepuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dbc105b-6b39-462f-aa88-52b650f66fe6/54472286522.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cae2211f-abae-4ef2-afec-dc193431cb34/30051513880.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_off00005338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5338 5468 bytes
SHA-256: 06d476fcba7ac8cd5570d7c726923f81daf9964daec278cb06aa3cb3db0bd4f5
font_01_sfnt_off000065be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65BE 10712 bytes
SHA-256: fdcdfee6ea836034ec2c934f8a485c7ecdf8576c92ee7e98f9c8dc4194ec62cf

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