Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba76658f32f3bca…

MALICIOUS

PDF

39.0 KB Created: 2020-11-08 11:09:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 55e62d84180295df506e7e0d50236f8f SHA-1: 77225e629e654f68e892fd28708e9ed3937d52d9 SHA-256: 7ba76658f32f3bca7b555de35723ad70ecc4bdce6a5f591eea249cee36b62755
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://traffking.ru/aws?keyword=cowboy+cha+cha+moves In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379234/normal_5f93e39ba396c.pdfIn PDF document text
    • https://megogolu.weebly.com/uploads/1/3/4/3/134314378/sonimimebumadixomuxi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fomajegesi.files.wordpress.com/2020/11/janerepaxejem.pdfIn PDF document text
    • https://zavuzujovati.files.wordpress.com/2020/11/genetics_a_conceptual_approach_6th_edition.pdfIn PDF document text
    • https://fodabijiwifi.files.wordpress.com/2020/11/distribucion_binomial_negativa_ejemplos.pdfIn PDF document text
    • https://solipisona.files.wordpress.com/2020/11/boot_camp_6._1.pdfIn PDF document text
    • https://begirider.files.wordpress.com/2020/11/usps_label_228_march_2016_word_template.pdfIn PDF document text
    • https://sakazedeg.files.wordpress.com/2020/11/15295237559.pdfIn PDF document text
    • https://kugudad.files.wordpress.com/2020/11/698957404.pdfIn PDF document text
    • https://jasobegofur.files.wordpress.com/2020/11/wetipunotediketilatibosu.pdfIn PDF document text
    • https://batuvowu.files.wordpress.com/2020/11/ponowepizaku.pdfIn PDF document text
    • https://todafoper.files.wordpress.com/2020/11/99714342417.pdfIn PDF document text
    • https://jasobegofur.files.wordpress.com/2020/11/3354134121.pdfIn PDF document text
    • https://lasubujadu.files.wordpress.com/2020/11/rilaxuwe.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_off00005916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5916 5212 bytes
SHA-256: 48722dfc79103cf85199c97efce81e5dbd7494cfeb1bbbbe3dd0f6b5863d086b
font_01_sfnt_off00006ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC8 10672 bytes
SHA-256: 60f4b374c5d23b908b0fa57b6c360dfa78ff0661e0e8b2b4c682594a4a1ab8c1