Malicious PDF — malware analysis report

Static analysis result for SHA-256 da63449c5f6d6d0d…

MALICIOUS

PDF

42.8 KB Created: 2020-10-17 15:17:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: cf886178cb2b4098ab76863c4e269bc2 SHA-1: ac41539b4c91ec7a8035e15ab14b3c4bb54049d2 SHA-256: da63449c5f6d6d0db7e943a52e78b845d94b8a74ceecd7f6e775be421eac43b7
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://cctraff.ru/strik?keyword=vio+%2525C3%2525B6l%2525C3%2525BCm+nedeni In PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/7600545.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/800671.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/monirafulowafix.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8980310.pdfIn PDF document text
    • https://batarodev.weebly.com/uploads/1/3/1/3/131380453/jigoziridawat.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/bigusak.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/sulusilalope-jobede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369932/normal_5f88ebedecc61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370987/normal_5f89551d15792.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367919/normal_5f8a2253759a5.pdfIn PDF document text
    • https://tiwilofudux.weebly.com/uploads/1/3/1/6/131606348/bobuviz.pdfIn PDF document text
    • https://winugemu.weebly.com/uploads/1/3/1/0/131070294/dimisapanerox-fadag-kozidoriv-juwajenu.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/2303361.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/872bfeb0-b5ea-4030-a5a8-ac89e66de9f5/28850988303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/010d5c07-328d-4132-897d-269bf7fb3ce4/48693475071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c11d9358-fdb6-4e1d-abe9-9dc65c78c6be/64926396553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45b5089d-b889-4a38-ba60-80f7e2a30166/faloxavif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a722d19f-c33a-436b-af69-d4f83cd0fb7e/kajaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53f5039b-4fa1-43bf-956a-99146d94e0d1/fotegijemabapix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b45a9a0-c215-4ba1-99a1-d7a7bf055c19/91920549698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40c2d71e-d077-4947-8615-f9031cf163af/94393352501.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_off00006894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6894 4708 bytes
SHA-256: 60838e0a66ea54c5b61682fde1e117130e46ce8f58043bcbaea682153c0e66f7
font_01_sfnt_off00007800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7800 11084 bytes
SHA-256: 0e89e11ea4f55abf842b8956aeb8f9e332081457543306283b4548e6392cc2f2

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