Malicious PDF — malware analysis report

Static analysis result for SHA-256 b057f3b0570f90e0…

MALICIOUS

PDF

50.1 KB Created: 2020-10-21 18:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-02
MD5: 7ffaf14cf7ef80aa6e7a5ef225057f7a SHA-1: ea5af4921e875ca6ed1de19f11903d86963d3894 SHA-256: b057f3b0570f90e0107b37b36fdfe79cee38df28fb04bd80f4be3e60cebeed33
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/aws?keyword=atresia+de+esofago+clasificacion+pdf In PDF document text
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/c702773c.pdfIn PDF document text
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/pitapajek.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/kujemodulo_pizab_livofutuke.pdfIn PDF document text
    • https://wojedebaroz.weebly.com/uploads/1/3/1/6/131637691/e29cd1b900a3.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/sokilijaw.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/6d37d7c29be0.pdfIn PDF document text
    • https://wojedebaroz.weebly.com/uploads/1/3/1/6/131637691/4576676.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/4fab3e13.pdfIn PDF document text
    • https://sisodiwitamusoz.weebly.com/uploads/1/3/2/6/132681746/niwuvudatetez.pdfIn PDF document text
    • https://mamexobupelo.weebly.com/uploads/1/3/1/3/131383482/miniketuponapa.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007536.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007536.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000ab5a.bin)
    • https://uploads.strikinglycdn.com/files/04bab840-e82e-40d9-9dca-03f0495943ae/witumavililumaposoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c317f92-4776-4f25-bba9-d6a8a5c4109f/10134537241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9e15ff4-efc6-4f7b-8501-9c29a52cc445/descargar_cicatrices_pelicula_comple.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/56819913786.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/domumubutex.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/99439314578.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/91167427403.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/rectangular_prism_net_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d7086cf-7658-4d3b-b8a0-e1e6db667a75/zopevokolonulemijobujimo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85270249-0092-45c2-bec7-f853f2eb9e55/vadasanadilelavugugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f3ef226-baa2-4c86-aff4-8688bb61fbc8/tazavabokakulotefejedin.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 extracted file (font_00_sfnt_off00007536.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7536 5100 bytes
SHA-256: 2619cd2e00292ef350be29292e2473211952b1cb301a5d17e987abf7bab21c9b
font_01_sfnt_off0000869a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x869A 11392 bytes
SHA-256: 8ee5011d03370068d54c290d42707a1999e2301b9ee438c9faeb0e39e67b9721
font_02_sfnt_off0000ab5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB5A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3