Malicious PDF — malware analysis report

Static analysis result for SHA-256 65691e3b0acfbc91…

MALICIOUS

PDF

42.8 KB Created: 2020-10-16 01:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a88e0135521b56454bcc8ad8964b2aeb SHA-1: 0f3c8b6f56377e9e4f58898dc4c0f9622c6c9a2a SHA-256: 65691e3b0acfbc91277783e2c52dc2845790a0c5be55eb3dea567d8487a4dd52
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://cctraff.ru/123?keyword=add+pdf+to+wordpress+page In PDF document text
    • https://site-1043260.mozfiles.com/files/1043260/50761042134.pdfIn PDF document text
    • https://site-1044148.mozfiles.com/files/1044148/tamobesekenulito.pdfIn PDF document text
    • https://site-1036791.mozfiles.com/files/1036791/73643623801.pdfIn PDF document text
    • https://site-1039222.mozfiles.com/files/1039222/solaxiga.pdfIn PDF document text
    • https://site-1043457.mozfiles.com/files/1043457/fizuvosabatetefetogeviso.pdfIn PDF document text
    • https://site-1036930.mozfiles.com/files/1036930/12880603699.pdfIn PDF document text
    • https://site-1039324.mozfiles.com/files/1039324/mitevovuruxawatetiv.pdfIn PDF document text
    • https://site-1036907.mozfiles.com/files/1036907/44648260771.pdfIn PDF document text
    • https://site-1040391.mozfiles.com/files/1040391/83671445034.pdfIn PDF document text
    • https://site-1040442.mozfiles.com/files/1040442/23804377895.pdfIn PDF document text
    • https://site-1040165.mozfiles.com/files/1040165/96136329984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369917/normal_5f88c5d57ae5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f8863f933d80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f8837cd5087f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f873cfa20473.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370319/normal_5f886a09a787b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368238/normal_5f87cd471a1d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f86f649b6b3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368954/normal_5f879ad64b3ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368768/normal_5f88c53c8e2e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373517/normal_5f88b8b051e07.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/4aee25a0-9ac4-4ee5-a7c0-b58b2d61d7cc/tizuf.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_off00006997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6997 5260 bytes
SHA-256: 7cc42ff10c3bec9d5ea7067c1a397ca2fde17d076c786c43482262c8ec55285f
font_01_sfnt_off00007ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA2 9948 bytes
SHA-256: 46e98584e3cce69d79c5cd7b3e4e1cc135b1bd1f4ed40ab820af224c626c6079

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