Malicious PDF — malware analysis report

Static analysis result for SHA-256 6836b3aa5ecbe713…

MALICIOUS

PDF

39.7 KB Created: 2020-10-28 22:48:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 7cd5ca846448912483ff76160fa3e61b SHA-1: 9cb13c4a95ec97f520d3a52c39349f9adb545e72 SHA-256: 6836b3aa5ecbe713b5602ae2878fe35758843f4431474691f682cbe06c70fc4b
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://gettraff.ru/pify?keyword=types+of+monks+dnd In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387571/normal_5f904820651b4.pdfIn PDF document text
    • https://xavixikani.weebly.com/uploads/1/3/4/5/134502132/8284004.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/nodidaxum.pdfIn PDF document text
    • https://xirunokud.weebly.com/uploads/1/3/4/4/134467368/wefapevizogosu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387921/normal_5f92271774dc5.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/152633.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373259/normal_5f8940504fa31.pdfIn PDF document text
    • https://wubigunes.weebly.com/uploads/1/3/4/5/134507070/468bbe83d03.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/c9c5f43.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/ff9df84a.pdfIn PDF document text
    • https://sepenunaxob.weebly.com/uploads/1/3/0/7/130776074/8891762.pdfIn PDF document text
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/vesedexomokapo.pdfIn PDF document text
    • https://namunobuwuper.weebly.com/uploads/1/3/0/7/130776476/2861442.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/6118dc6a-f3c7-4960-b2f3-b6612f4c1426/6677032980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ed4c91a-65d0-4a32-89e3-f54288a1bea8/lotunolaxirikemikidot.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/jamugifeweba.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/lafaraborigivapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91131754-01b2-4de2-9eb4-3cfbf0e03dcb/tolopopojofukozomubo.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/estadisticas_del_cancer_de_mama_en_el_peru_2017.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_off00005ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED0 4964 bytes
SHA-256: 1b206200174c78aa362bbb9d8627f7e3bcd6c8cc54055e8d4b1d68fd932cd1b2
font_01_sfnt_off00006fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBA 10120 bytes
SHA-256: d1e14696084efd1a093c976644e8e101609c2f6918d8d1fb7d1a2317dc8fcccf

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