Malicious PDF — malware analysis report

Static analysis result for SHA-256 431ba7067141f9d5…

MALICIOUS

PDF

41.9 KB Created: 2020-11-07 06:07:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 57dcea605cb6cf02c732b1ef42e6e599 SHA-1: a70d73e0544b958537d36e8d1a17c999a5562ad5 SHA-256: 431ba7067141f9d5bbec294e8368a49fd18fb45c1c074f7990f4c2f1d39d5365
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/aws?keyword=offline+spotify+apple+watch PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411926/normal_5f978397eca0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417656/normal_5fa5dd1f2f173.pdfIn PDF document text
    • https://sitiguzesamow.weebly.com/uploads/1/3/4/4/134401829/8935846.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/9276785.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380072/normal_5f9ef8c8d61a0.pdfIn PDF document text
    • https://bakukumi.weebly.com/uploads/1/3/4/4/134437371/waratitipabem.pdfIn PDF document text
    • https://zuvubexusemeto.weebly.com/uploads/1/3/4/3/134373725/319fa5ca1363dc.pdfIn PDF document text
    • https://mogunugive.weebly.com/uploads/1/3/4/3/134381007/rivuk-mepizina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401716/normal_5f9acaea9a211.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410956/normal_5fa2f2ce6d184.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_5f870ec559f4a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://balapep.files.wordpress.com/2020/11/faziguneb.pdfIn PDF document text
    • https://fizafadolozu.files.wordpress.com/2020/11/31713389540.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_off000065f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F4 5228 bytes
SHA-256: c59797853e793af78e5fbefca650871830a6a29c800f4c85eee9ca2517459582
font_01_sfnt_off000077dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77DD 10256 bytes
SHA-256: 71e7630e9dec2a13bd1a9c48c44e25b63189853484c7a8766636d1e3d5966221