Malicious PDF — malware analysis report

Static analysis result for SHA-256 f77137f24d699b40…

MALICIOUS

PDF

42.2 KB Created: 2020-11-06 15:38:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 58a67953510331d4e15e6c2b62ce3fbd SHA-1: 29e8add7886ee59c3d4b32daca0b185e89ae066a SHA-256: f77137f24d699b40909491255a4308942ee1e1c20ec612317aafbe7f3802f040
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://traffking.ru/123?keyword=inca+social+structure+and+society In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366662/normal_5f874f9d5f49c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370996/normal_5f8f3c436b950.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5f92fd2378b0f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://kajebevomota.files.wordpress.com/2020/11/55719555607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ebbfdc9-be0a-4393-a86e-afb00f581d77/vemataza.pdfIn PDF document text
    • https://sisiviweze.files.wordpress.com/2020/11/goresosuvufat.pdfIn PDF document text
    • https://rezekine.files.wordpress.com/2020/11/tatojesanawav.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/56254825798.pdfIn PDF document text
    • https://pigafajajo.files.wordpress.com/2020/11/68433601774.pdfIn PDF document text
    • https://mutozofe.files.wordpress.com/2020/11/65548376527.pdfIn PDF document text
    • https://zatejoru847961968.files.wordpress.com/2020/11/72489844693.pdfIn PDF document text
    • https://xivesepolila.files.wordpress.com/2020/11/30877645579.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_off0000674a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x674A 4972 bytes
SHA-256: 2fc3a87d4ac7d02fcc74d6cf6149dcff546d61d7ee117fec4a5a9c2cb995c3f6
font_01_sfnt_off00007847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7847 10564 bytes
SHA-256: 9921a8a0d02f44442bed10049fdcf58ff4fe6fc28d49791e0aaec53ca9f73597

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