Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c800ceece9a90a0…

MALICIOUS

PDF

39.4 KB Created: 2020-10-24 14:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: a314a5338cb06c7f126e1c8aa179f7d1 SHA-1: 2ec0f94fa1c1a975e1991b3580962e2d84116ea6 SHA-256: 6c800ceece9a90a0b250d3c266c0c7e766dae032aa41d57cc9eddd2428340390
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/pify?keyword=have+got+has+got+%25C4%2587wiczenia+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391047/normal_5f8f410816aab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368975/normal_5f8afb52cc2fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380869/normal_5f900963b253d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369663/normal_5f93b1ca83f47.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/zefevise_segefoso_funojap_badusuzazu.pdfIn PDF document text
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/8676388.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/rebodi.pdfIn PDF document text
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/wotusotosig.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/mumupage.pdfIn PDF document text
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/fulixirezufotu.pdfIn PDF document text
    • https://zuragani.weebly.com/uploads/1/3/1/4/131438510/kojuzemazalosajijive.pdfIn PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/voleba.pdfIn PDF document text
    • https://mogidudurunupiz.weebly.com/uploads/1/3/2/6/132695636/sebubinadus_vokepobopa.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000551f.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000551f.bin)
    • https://uploads.strikinglycdn.com/files/23e6c3c2-1cde-4272-9534-06dbd700b04c/lofuwuwibanomufateliwuza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4884efd-def4-4701-9f20-50ee40f20d92/the_intelligent_investor_first_editi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6725385a-2488-4312-8e4d-f61219987801/29829324206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7109a2d-5b4f-452b-8856-1a1c82caa9b7/panazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffbd2b57-0770-45d8-905e-a4cb025d7070/80923947918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e21aefcf-47bb-4a30-b011-aba1c3fd2817/dowijopajatanezazidis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7d6e745-b4e5-43d8-9c22-d0948ba15321/le_plan_cycle_2.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/clasificacion_de_las_empresas_segun_su_tamao_peru.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/adobe_reader_installer_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/logic_gate_table.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_off0000551f.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000551f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x551F 5592 bytes
SHA-256: e2604034544743d4499a8b3395ad1e97e27c91bfe79b97cc9ae67d1e7f6bfb7c
font_01_sfnt_off00006807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6807 11944 bytes
SHA-256: dd8a867d41ef23129e112f9fdca05efc57b615b9ac172b1f10003f37f9af6b5c