Malicious PDF — malware analysis report

Static analysis result for SHA-256 324dd3f89072e73d…

MALICIOUS

PDF

42.4 KB Created: 2020-10-01 10:14:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 836228ed05968a96af52ef18669eaa5c SHA-1: acd054ff5048c926803d90303d6aca8aeb9358e3 SHA-256: 324dd3f89072e73d96fd8f53175ea157d19be1e2a15e91905dc7cb83852e2489
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=bilirrubina+directa+indirecta+y+total+pdf In PDF document text
    • https://site-1037022.mozfiles.com/files/1037022/fekofugugozujiwesipo.pdfIn PDF document text
    • https://site-1038780.mozfiles.com/files/1038780/65686041780.pdfIn PDF document text
    • https://site-1036962.mozfiles.com/files/1036962/99844537188.pdfIn PDF document text
    • https://site-1036926.mozfiles.com/files/1036926/78350392077.pdfIn PDF document text
    • https://site-1037887.mozfiles.com/files/1037887/nuxuzepobole.pdfIn PDF document text
    • https://site-1039328.mozfiles.com/files/1039328/giwebawoko.pdfIn PDF document text
    • https://site-1036852.mozfiles.com/files/1036852/67435218359.pdfIn PDF document text
    • http://xemaweja.aria-food.com/uploads/1/3/1/4/131436967/9098284.pdfIn PDF document text
    • http://kejugura.chiricopt.com/uploads/1/3/1/3/131380183/rixizezufi.pdfIn PDF document text
    • http://files.travilliangroup.com/uploads/1/3/1/3/131384335/vagebujet.pdfIn PDF document text
    • http://gezuw.araluen.info/uploads/1/3/0/9/130969862/zekodiwupuvawak-narebesewepolod-baxulivukek.pdfIn PDF document text
    • http://files.brookesummers.blog/uploads/1/3/0/9/130968996/zolanax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/af2e08e2-800b-4390-8332-d6261bc974ab/85442146612.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_off00006489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6489 5260 bytes
SHA-256: bca9dff3991e98f514efa3d4be62709869ff3851c0a038c415f2a9bb478ac79a
font_01_sfnt_off00007682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7682 11152 bytes
SHA-256: e245969904b4d6d34ce7ae40c32d4a51f52662f8c6b546cd4255124938e9f3d3