Malicious PDF — malware analysis report

Static analysis result for SHA-256 3104734bfc5cc81d…

MALICIOUS

PDF

41.8 KB Created: 2020-10-07 15:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: aa0e4fcd31ef88b16961f593852a0821 SHA-1: a678e447e726af55e8935c313af2fdf2c560d682 SHA-256: 3104734bfc5cc81d8064e5e172fdf47a5eb505f2acd9ae86abc5ca0ca1d02eda
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://ggtraff.ru/strik?keyword=business+communication+essentials+7th+edition+pdf+download In PDF document text
    • http://files.stressfreesettlements.com/uploads/1/3/2/6/132681954/putog-xitos-xizaz-tiwuv.pdfIn PDF document text
    • http://tojeb.arabesquelondon.com/uploads/1/3/1/0/131070493/5f3a4c2.pdfIn PDF document text
    • http://files.empowerposters.com/uploads/1/3/0/7/130775846/490723.pdfIn PDF document text
    • http://files.nathanwitter.com/uploads/1/3/0/7/130775275/jimumaxomukupag.pdfIn PDF document text
    • http://zevur.jesipace-berkeley.com/uploads/1/3/0/8/130813694/8736569.pdfIn PDF document text
    • http://files.triplecrownlacrosse.com/uploads/1/3/1/3/131379054/majizojad_fawinuxubu_sewakumaw.pdfIn PDF document text
    • http://files.suttonestateelectricbikehire.com/uploads/1/3/0/7/130740553/puvamokipivulur.pdfIn PDF document text
    • http://files.portageresourceguide.com/uploads/1/3/1/6/131606644/8719065.pdfIn PDF document text
    • https://site-1036826.mozfiles.com/files/1036826/kakofok.pdfIn PDF document text
    • https://site-1040006.mozfiles.com/files/1040006/vobituno.pdfIn PDF document text
    • https://site-1038897.mozfiles.com/files/1038897/34862600697.pdfIn PDF document text
    • https://site-1039301.mozfiles.com/files/1039301/83593040404.pdfIn PDF document text
    • https://site-1036829.mozfiles.com/files/1036829/dalamalebexejuzisov.pdfIn PDF document text
    • https://site-1039270.mozfiles.com/files/1039270/musatitapowezob.pdfIn PDF document text
    • https://site-1043576.mozfiles.com/files/1043576/6747701559.pdfIn PDF document text
    • https://site-1043646.mozfiles.com/files/1043646/kifofororokefumasu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00006293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6293 5520 bytes
SHA-256: 60067416fa754806971c6b22b784c30cecec1bf5a376dd09f330d4742ff93314
font_01_sfnt_off00007552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7552 10788 bytes
SHA-256: 0067871490d86dcc642dad5da3f0c16c7f5386a207a284add7584ffd66bfda5b