Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2388a973b44e515…

MALICIOUS

PDF

44.9 KB Created: 2020-10-15 02:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 8aa968dd11cc223cfe589c8bbf79ead4 SHA-1: 56e8755b896ae53d046fe14018be7ff3720509de SHA-256: c2388a973b44e51504efe2402b92f968198552d541e04c6328dee71040d78962
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/123?keyword=clarinet+altissimo+finger+chart+pdf In PDF document text
    • https://site-1042765.mozfiles.com/files/1042765/janimuresav.pdfIn PDF document text
    • https://site-1044417.mozfiles.com/files/1044417/27392417575.pdfIn PDF document text
    • https://site-1037854.mozfiles.com/files/1037854/96340171531.pdfIn PDF document text
    • https://site-1043520.mozfiles.com/files/1043520/jurovo.pdfIn PDF document text
    • https://site-1040180.mozfiles.com/files/1040180/muvezakuko.pdfIn PDF document text
    • https://site-1042888.mozfiles.com/files/1042888/wepilejigasetivo.pdfIn PDF document text
    • https://site-1042988.mozfiles.com/files/1042988/42995890004.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f8742ee4db89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f876a7594e47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f8720a285e4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f8747122ef9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f877d6b066cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f870241327da.pdfIn PDF document text
    • https://site-1038322.mozfiles.com/files/1038322/6655557451.pdfIn PDF document text
    • https://site-1042555.mozfiles.com/files/1042555/xukuzozoxakezuvakujexe.pdfIn PDF document text
    • https://site-1040359.mozfiles.com/files/1040359/22921143538.pdfIn PDF document text
    • https://site-1039405.mozfiles.com/files/1039405/7569337439.pdfIn PDF document text
    • https://site-1038363.mozfiles.com/files/1038363/51790787003.pdfIn PDF document text
    • https://site-1036840.mozfiles.com/files/1036840/moxim.pdfIn PDF document text
    • https://site-1039251.mozfiles.com/files/1039251/20890229413.pdfIn PDF document text
    • https://site-1040512.mozfiles.com/files/1040512/19976516673.pdfIn PDF document text
    • https://site-1040509.mozfiles.com/files/1040509/daxikenonarutitureba.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_off00007186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7186 5476 bytes
SHA-256: 8098f4962f13e32770520af3de4bb67120547ee6bac8c93fc7991b08c6f613cd
font_01_sfnt_off000083f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F7 10148 bytes
SHA-256: c2bed96d465db23f5dfa1a0eb35e44146c4057471b25b2295c0aa96a71f1d138