Malicious PDF — malware analysis report

Static analysis result for SHA-256 be55cbb600ad9292…

MALICIOUS

PDF

54.7 KB Created: 2020-10-17 07:41:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d303acd03199ad7c2817d869d3e8b6a7 SHA-1: 753b9765cf242403570a8fcfee3df908a902c2a5 SHA-256: be55cbb600ad9292ac9da8ba9338b822f5d00945004c99ac5287025d715dbb2a
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=jeu+d%2527+echec+electronique+mephisto In PDF document text
    • https://kenilajapa.weebly.com/uploads/1/3/1/0/131069910/5809899.pdfIn PDF document text
    • https://ligofaxudatejot.weebly.com/uploads/1/3/0/7/130739538/6ea2e.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/56c58af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367640/normal_5f87b9227113f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369496/normal_5f88b5e51bfba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368736/normal_5f887ca50e746.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5f889d3b12cfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372723/normal_5f8a5ea8b0412.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f8702685280f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f870a013777d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371508/normal_5f8889f11b229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367950/normal_5f8a1686c668b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_5f8a26cb2d448.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/papugevipu_nefivudem.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/tebavu_mofevuz_punoxibera_gijipomole.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/kezakavukojeg.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/a4f427e3-d2be-4708-b205-daebebde962b/gefepajizowugidijujek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e3c2c15-b01f-49ec-aa53-dca728512ffe/1855554509.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de05f2d7-4452-4409-a162-dd3b3ad75c76/56822983494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfbaacd9-2ec9-421c-8bd0-e52cbd947e27/17537348108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c3784d9-a5fd-42f8-8c1e-40406605c7e1/nofomanebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9226/1529/files/dexeropizivojofupaxidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/5640/6940/files/rewolejewixivek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9816/8743/files/persepolis_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9462/0333/files/environmental_impact_of_meat_production.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_off000098b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98B2 5252 bytes
SHA-256: a9efe1b5ada2a8cb71a3f8303e5218da7767211432d6b8d9c12a6de27b9ec95e
font_01_sfnt_off0000aa62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA62 10096 bytes
SHA-256: 38480704f633ff4558daf5fc1cf449db55a404618ea28638ba46f9ddd3a6854a