Malicious PDF — malware analysis report

Static analysis result for SHA-256 f280e15129000fc7…

MALICIOUS

PDF

43.4 KB Created: 2020-10-20 21:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: c6b6150e4189081499d2f3f190794dc4 SHA-1: d28aa5d78fafe77d33fafd1d8b231d0f0f890131 SHA-256: f280e15129000fc73f8e65adba69545e0cd6485e1037ae78637cc20f69952097
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=c%25C3%2583%25C2%25A1ch+ch%25C3%25A1%25C2%25BA%25C2%25B7n+facebook+kh%25C3%2583%25C2%25B4ng+c%25C3%25A1%25C2%25BA%25C2%25A7n+%25C3%2584%25E2%2580%2598%25C3%25A1%25C2%25BB%25C2%25A3i+48 In PDF document text
    • https://wefejakero.weebly.com/uploads/1/3/0/8/130814310/badeniwetu.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/mofep.pdfIn PDF document text
    • https://dojulukasinu.weebly.com/uploads/1/3/0/7/130776790/2706857.pdfIn PDF document text
    • https://dujopoda.weebly.com/uploads/1/3/0/7/130739119/kinarap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366668/normal_5f8731762877a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383470/normal_5f8f2afd78fbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376096/normal_5f8b4b3656bd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389104/normal_5f8ef74abf564.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369138/normal_5f8c75585188e.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/binefo.pdfIn PDF document text
    • https://bewupoterefi.weebly.com/uploads/1/3/1/3/131380107/godonasowaku-babutipufukixor.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/6069273.pdfIn PDF document text
    • https://poxobavu.weebly.com/uploads/1/3/1/4/131453713/7335079.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/mapuv_nozufamufiredin_xerurefuxirin.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/gigulugow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tadovu/1457414643.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/lolidupetidonogixokiki.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/29487120383.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/57834658998.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/41845648323.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_off000064c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C5 6552 bytes
SHA-256: 8d1a00e3cec214345cadefe4ef988d937d5cb7c4018784307a29836bb67a5fbe
font_01_sfnt_off00007a6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6B 10356 bytes
SHA-256: 5c333d3c2fe7303cd7fbc822a06ac805af19617ee157794e3c67481b418ee715

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