Malicious PDF — malware analysis report

Static analysis result for SHA-256 2abc7798e1317996…

MALICIOUS

PDF

77.4 KB Created: 2021-02-19 09:04:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 37c53a4cdb35cba216197d2aad32ee52 SHA-1: 0a3a2d261b306499f8768b2afe6aecf030d42c5a SHA-256: 2abc7798e13179965b895c47d4dfbd09490799a326dee0e00053395e76bc5c04
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or scam attempt. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of external URIs and the link farm heuristic point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://jacksth.ru/123?utm_term=dyson+vacuum+dc16+parts PDF link annotation
    • https://cdn.sqhk.co/jaxabofapuw/Dotgjge/sutidozekosiwerobabebivo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413239/normal_602054cbbeadc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369653/normal_5ffebc80184e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405639/normal_5fdce033f2e65.pdfIn PDF document text
    • https://cdn.sqhk.co/dibitarebizu/CgiK4JR/39009103941.pdfIn PDF document text
    • http://opendouche.xyz/xarefevez1onla.pdfIn PDF document text
    • http://devgame.design/76363293460n74ud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427268/normal_6017409b5a35c.pdfIn PDF document text
    • https://cdn.sqhk.co/zubuwebofe/jjbWjiW/56271846989.pdfIn PDF document text
    • http://italia-doc.fun/canon_picture_editing_softwarexmz3m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494877/normal_5fecadf601924.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fozeworot.rf.gd/depotavotiwosewawux.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/54027366567.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/66607541686.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/newsletter_template_free_sample.pdfIn PDF document text
    • http://safamulidapi.epizy.com/carry_on_jatta_2_movie_mkv.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_off0000f0c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C7 5552 bytes
SHA-256: 2b179c8c553b834ac8bfcd016cc9e44277250ec5e134921b73b3a08e722bc5c7
font_01_sfnt_off000103af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AF 10816 bytes
SHA-256: a8c2a140dee510925c0c3ebdc6e04ca69e9be959c81c9863aa1c248ee203e35a

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