Malicious PDF — malware analysis report

Static analysis result for SHA-256 2861590427eb4a0d…

MALICIOUS

PDF

66.4 KB Created: 2021-02-12 21:03:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e19a4ba3455baa5bc2e26270ecb07f55 SHA-1: 2b8a9e61029d6049c181dedc150045b24a3342bf SHA-256: 2861590427eb4a0d497358d56062ad7215e6691dbcc2c36dd468eb10197be145
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/123?utm_term=i+shall+not+want+lyrics+misty+edwards'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://yafferge.ru/123?utm_term=i+shall+not+want+lyrics+misty+edwards In PDF document text
    • https://static.s123-cdn-static.com/uploads/4489045/normal_60009934b1eda.pdfIn PDF document text
    • http://repuvelu.22web.org/maziladazavezuginimebor.pdfIn PDF document text
    • http://jegipebor.iblogger.org/saful.pdfIn PDF document text
    • http://fiselijuduguge.iblogger.org/carbothane_134_hs_product_data_sheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402478/normal_600fe056ee2a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408176/normal_5ffa8758569ba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vemesivudaro.epizy.com/vidyasagar_university_logo.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/vosazupukeverawena.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/conditional_formatting_google_sheets_equation.pdfIn PDF document text
    • http://luzirilokupozar.rf.gd/74486223896.pdfIn PDF document text
    • http://sirowozikuko.epizy.com/industries_qatar_qsc_annual_report.pdfIn PDF document text
    • http://kodadus.epizy.com/catalogo_bendix_zen.pdfIn PDF document text
    • http://xarigezosuwa.rf.gd/autoimmunity_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/android_studio_api_level_21.pdfIn PDF document text
    • http://bajefeluxit.rf.gd/argox_special_edition_bartender_ultralite_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/blitzscaling_book_free.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/phpspreadsheet_install_linux.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_off0000c609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC609 5312 bytes
SHA-256: 2837db31c983f403e2511981496b46c25c4abc5624e7ce140e9b4b46dce9fd00
font_01_sfnt_off0000d802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD802 10804 bytes
SHA-256: 5dca3e2a08f703bba065922d44242d461145f4064c5b77a746183cc3cc3563a2

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