Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fda66d84326cd1d…

MALICIOUS

PDF

43.3 KB Created: 2020-11-07 20:02:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 544a368d506fcab896454812f6c9d9d7 SHA-1: 241093a87c12a636669ece012e75f0bff33b07e7 SHA-256: 4fda66d84326cd1dda7663e69f1b7e7c1f109c6c841e3ebb05598918ba782f3c
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?keyword=spite+cannon+2+flash+games PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393026/normal_5f9bca9565b05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373243/normal_5f8e653f2b2b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460043/normal_5fa48ea5c16ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://kujedajib.files.wordpress.com/2020/11/kujebemasarakulixuzu.pdfIn PDF document text
    • https://vivader.files.wordpress.com/2020/11/34592590606.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/music_tours_2020_usa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22b03547-3d49-4825-ab66-775de4f59c7a/87679485791.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7585810-388a-4b2a-96a4-2446da49c71c/wudalunidisotofidi.pdfIn PDF document text
    • https://gojifededub.files.wordpress.com/2020/11/pifusefoxidusoju.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/cabanellas_diccionario_jurdico_elemental.pdfIn PDF document text
    • https://vukewakir.files.wordpress.com/2020/11/vekelixokevixafugezagew.pdfIn PDF document text
    • https://rejuxakol.files.wordpress.com/2020/11/82888458682.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/lotemululigikixa.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_off0000693b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x693B 5568 bytes
SHA-256: f6f7b24c71542b580559ee97c6b829ec53dd3147731e4e313ed50324b9d5cc78
font_01_sfnt_off00007c13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C13 10660 bytes
SHA-256: 48c458058d5a2fd4e2f3ee60f6926339b1b2123382617ec280f83ff29edb6537

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