Malicious PDF — malware analysis report

Static analysis result for SHA-256 2926a9dea86ef0a7…

MALICIOUS

PDF

45.0 KB Created: 2020-10-01 14:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 885e4f8bd256098234860d0c66fdbba6 SHA-1: b75af67bfac713d6e18fcfc085b127baa0c2f06b SHA-256: 2926a9dea86ef0a78cac0a9cd845e200ffaf3d9fd4e7bdc044612edb65ebcbb3
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=livro+biocombustiveis+volume+1+pdf In PDF document text
    • https://site-1037044.mozfiles.com/files/1037044/91274995595.pdfIn PDF document text
    • https://site-1036750.mozfiles.com/files/1036750/50021925709.pdfIn PDF document text
    • https://site-1037279.mozfiles.com/files/1037279/17133401692.pdfIn PDF document text
    • https://site-1037204.mozfiles.com/files/1037204/27248503456.pdfIn PDF document text
    • http://files.thesoftandwild.com/uploads/1/3/0/7/130776769/4187543.pdfIn PDF document text
    • http://sekajelof.treetopkidstherapy.com/uploads/1/3/1/4/131453054/0b5fe5156.pdfIn PDF document text
    • http://files.ryleyskelton.com/uploads/1/3/2/7/132740309/zozez.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/1/0430/6419/7273/files/sopifixi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8264/5665/files/atsuta_shrine_japan_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ganisififado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9415/5170/files/wumibowite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/046e5bf7-18c2-48d4-a7e3-f97fe8ae3ed5/68322159831.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_off000072cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72CC 5284 bytes
SHA-256: 745d53f4cb1427baddb294345ea2ad06cd3a74cd0a605b85c6f8ca3d877740c3
font_01_sfnt_off000084c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84C0 10188 bytes
SHA-256: 782523e95f597073729e4228307f8ecd58b719c41b16ff8612afb25935eefec2