Malicious PDF — malware analysis report

Static analysis result for SHA-256 02843a036eccaa11…

MALICIOUS

PDF

38.1 KB Created: 2020-09-30 06:36:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 774e7fdbf3f122eb0db8c5cd3dee3d1c SHA-1: 666693a41a384dbfabe1e5a25f5fc71d6ebb7031 SHA-256: 02843a036eccaa11c93c1ac29ef50d6164f7c7fe5ce77232083c169497a951a7
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://cctraff.ru/strik?keyword=academia+vampirilor+vol+6+pdf+download In PDF document text
    • https://site-1036815.mozfiles.com/files/1036815/43240039786.pdfIn PDF document text
    • https://site-1036880.mozfiles.com/files/1036880/motalupunebewu.pdfIn PDF document text
    • https://site-1037890.mozfiles.com/files/1037890/62610925799.pdfIn PDF document text
    • https://site-1036835.mozfiles.com/files/1036835/xumijik.pdfIn PDF document text
    • https://site-1037844.mozfiles.com/files/1037844/48433302529.pdfIn PDF document text
    • https://site-1036965.mozfiles.com/files/1036965/mazukusenomotevanokineg.pdfIn PDF document text
    • https://site-1037864.mozfiles.com/files/1037864/torusuxolobimovutazaxufo.pdfIn PDF document text
    • https://site-1037262.mozfiles.com/files/1037262/54169849941.pdfIn PDF document text
    • http://zumumuxa.jillrumleyart.com/uploads/1/3/1/4/131408024/xugidetananiv.pdfIn PDF document text
    • http://files.tacdlo.org/uploads/1/3/0/9/130969918/bd803238.pdfIn PDF document text
    • http://files.seagrasspottery.com/uploads/1/3/2/7/132710780/24892.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4730/2806/files/febuvesizodapokojuxip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/0139/6638/files/wibifexakude.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_off0000580b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x580B 5416 bytes
SHA-256: 87ac3cb473d05cfbb9fa80af319114d12f6ade600c2bfd22e4f8b08f5f96cf53
font_01_sfnt_off00006a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7F 9732 bytes
SHA-256: d981600f186e12bea752d719b5de126508e09bd2b562174462e0f66442e430ec