Malicious PDF — malware analysis report

Static analysis result for SHA-256 acbf3260ab390c73…

MALICIOUS

PDF

37.7 KB Created: 2020-10-17 09:41:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9a4dfb8fb68c46bd72be3d88ecde6147 SHA-1: 182c29f9cbafd7651f663afd4f10144760a27d35 SHA-256: acbf3260ab390c73e777d98163395d989f83f543c8d4a31a16bced4452c0c5fe
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=the+little+book+of+chakras+pdf In PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/fipabatekak-kagarusufulosab.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7360136.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/8911912f5f58fde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f871a41a60e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f87360c08374.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373304/normal_5f89c160aca0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_5f879d3b350f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369330/normal_5f8a8e0c34a8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f89114dab01e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_5f8a7c133b54e.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/4e0d994f.pdfIn PDF document text
    • https://zekuwatifakaxi.weebly.com/uploads/1/3/2/8/132815855/2679260.pdfIn PDF document text
    • https://gemenudotipetal.weebly.com/uploads/1/3/2/6/132695720/bewexatarezuf.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/1a27643b41869.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/3406eb71d.pdfIn PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/1493900.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/gavifubutugut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1456/9640/files/center_of_gravity_male_vs_female_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4685/3016/files/piaget_and_vygotsky.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0996/4694/files/terence_tao_real_analysis_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7770/8197/files/centre_pivot_for_sale_usa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5809/3976/files/the_big_doll_house_wiki.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_off000055fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55FB 5396 bytes
SHA-256: 409a7b4abba890ef1c1cbbb558d37e168f23ddf90a1e69a97d04a893fda0989d
font_01_sfnt_off00006840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6840 9848 bytes
SHA-256: 0a12cb7576f1db51f5e3b1d94bf6e7fd93c5b570fee8b73c5fafcc3acffcb3ff

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