Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe2cd4f2975995d…

MALICIOUS

PDF

85.2 KB Created: 2021-03-19 18:50:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 424201266f304cbff81c4f63f2d399a7 SHA-1: 20cdb895225e3b9b9debeb387d0be01b921d47ec SHA-256: 5fe2cd4f2975995d8614ee500a6aed06c06fc10e98149fae9b39cc98997879a9
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a common tactic for distributing malware or directing users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to lure users to malicious content, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://druttle.ru/strik?utm_term=civilization+6+gathering+storm+contains+rise+and+fall PDF link annotation
    • http://fawaxifiwuzodil.scienceontheweb.net/sexadega.pdfIn PDF document text
    • http://pupezawat.scienceontheweb.net/mikuvuxeguralilirokuluv.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/a12d056e-0d56-45b7-8b4d-8c1566bf58bf/22430938922.pdfIn PDF document text
    • https://c1f973cf-d719-4acb-8f9e-cd83ae4fb94d.filesusr.com/ugd/057766_d32fbf2bc459499d96310ea67f7b3e73.pdf?index=trueIn PDF document text
    • http://gurabagoderes.atwebpages.com/siriously_delicious_cookbook_recipes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21bc6b52-2944-49d9-9001-e122cbf624bc/pedalera_digitech_rp80_precio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8039318a-ba31-4461-81aa-15a363584e5c/pidageviweweri.pdfIn PDF document text
    • https://0e627107-309b-4451-a84d-e7064c41fccd.filesusr.com/ugd/04c368_db082d910fe2472ba50e545c0a513b54.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7058858c-2bd3-43d8-87d0-b142954191e9/short_fairy_tales_with_moral_lesson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6293bcd1-b9de-4c48-889e-eb3108141e73/frigidaire_stackable_washer_dryer_parts_diagram.pdfIn PDF document text
    • http://lolunoxij.myartsonline.com/14328006174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f2690cf-f70b-4e34-8f87-6bbb566afae0/pivatulamoweferasopufadop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f7d9700-d8c1-4d7c-a851-f5925fbc7391/kafumikeziki.pdfIn PDF document text
    • https://e209d09f-5af8-48a0-acfc-72d03e9bea0d.filesusr.com/ugd/946fcc_9f5c596207d64bbda5d56cd35fd70314.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/695e3678-4dd7-45fb-a8f6-bb289701ae90/tilevitojawam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/473ec1ad-c607-4be7-865c-8f33ce369252/30304387097.pdfIn PDF document text
    • https://c4bedd8b-a3e9-4aa8-9751-a6fde4035b7e.filesusr.com/ugd/037f08_e48b6a0ed3344acab8fcff5bab2127ed.pdf?index=trueIn PDF document text
    • https://32cf4326-ba62-484c-a3ca-05d02c2dd2e5.filesusr.com/ugd/0b46e6_d3ccfa1279434f26ab4f47824c6ed481.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad1941cd-ca99-4a24-882f-8cfa179cc514/building_cross_section_photo.pdfIn PDF document text
    • https://042e50b4-45d0-4577-915a-c14d43ab21ad.filesusr.com/ugd/18f527_f90a7b20ef054ddd82bc4fa6c26602ba.pdf?index=trueIn PDF document text
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_f140daa0f27f4b608fa471722ac60531.pdf?index=trueIn PDF document text
    • https://8b8c7005-3af0-45a1-8e5b-a6902caa9335.filesusr.com/ugd/dbd7d9_0a3c479fc35b46fdb9e6f8b1c45b6167.pdf?index=trueIn 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_off00010cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC1 5604 bytes
SHA-256: c4d3c2e66d266639431f7a02a0a03044c9bf6366513d534267a0767d083eed0c
font_01_sfnt_off00011fb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB0 11980 bytes
SHA-256: 1e53acff3354fd0d6861f3afa25fa725a45a5513e40da453048fabe65e3f7df6

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