Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af0eb39fcfb5922…

MALICIOUS

PDF

50.2 KB Created: 2020-10-11 00:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 046ddd46227ad1da3d4f45a5174d291b SHA-1: 7575f856161af5d53073c921976aa83525677b01 SHA-256: 1af0eb39fcfb5922d3d701048a810791d5c16492ea48156ce5608018e0c3f8f8
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://ggtraff.ru/pify?keyword=el+ni%25C3%25B1o+con+el+pijama+de+rayas+resumen+en+espa%25C3%25B1ol In PDF document text
    • https://site-1048515.mozfiles.com/files/1048515/34725933129.pdfIn PDF document text
    • https://site-1037071.mozfiles.com/files/1037071/52670912363.pdfIn PDF document text
    • https://site-1037276.mozfiles.com/files/1037276/84533204155.pdfIn PDF document text
    • http://files.silverthreadsupholstery.com/uploads/1/3/1/4/131406222/keted_werutenozinarud_varivuseduxesax.pdfIn PDF document text
    • http://losonapo.barrons-institutional.com/uploads/1/3/0/7/130775735/532308.pdfIn PDF document text
    • http://files.wwfishingtackle.com/uploads/1/3/0/8/130874029/kimenulod-kudiki-jofadajejuvajig.pdfIn PDF document text
    • http://gexajadub.pbi-global.com/uploads/1/3/0/7/130739090/rusesofotapite-zesubojijife-wojalofegivu-fowijakozinis.pdfIn PDF document text
    • http://files.treblestrings.com/uploads/1/3/2/6/132695732/8097815.pdfIn PDF document text
    • http://files.eusebiachurch.com/uploads/1/3/2/7/132741144/8833079.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/c14cb264-a579-45fd-b70f-f83946dfbd0d/81312418606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97c6cccd-357c-4c54-ba12-3561381e9e2e/somunexugip.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_off000077b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77B2 5564 bytes
SHA-256: 8ab0b235fb85286d393cfc46fb94158a169e4f0dd218a5fed7f02fb077b16ead
font_01_sfnt_off00008a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A45 15704 bytes
SHA-256: 2d208646211201dbd41f231f749a9bd8fb57526ded356e2b420e89d0e20c0765