Malicious PDF — malware analysis report

Static analysis result for SHA-256 8068612f96dea57d…

MALICIOUS

PDF

76.3 KB Created: 2021-02-25 17:01:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 3f095b570b050404ae8cd2c6bffc38f6 SHA-1: 184ef7d1f92a585b256c6698f81cbcbf28167fd7 SHA-256: 8068612f96dea57d2622c3cc9d39ffeb3ecfcb4a246f627fbbdbcf2e71f405de
66 Risk Score

Malware Insights

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

The PDF contains a high number of embedded URLs pointing to various domains, indicating a link farm or phishing attempt. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to potentially harmful content or phishing sites.

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://maypoin.ru/award?keyword=how+often+do+you+change+carbon+filter+in+diaper+genie PDF link annotation
    • http://wopebexe.66ghz.com/funujevalamozarivuvipep.pdfIn PDF document text
    • http://zanovekolasin.mywebcommunity.org/the_time_travelers_wife_movie_download_300mb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476285/normal_600eb20ca5201.pdfIn PDF document text
    • http://zevewidojodot.mywebcommunity.org/valagofexanuvika.pdfIn PDF document text
    • http://fakixigulidol.mywebcommunity.org/40860054098.pdfIn PDF document text
    • http://sibatike.getenjoyment.net/calories_in_taco_bell_crunchwrap_supreme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417648/normal_6026a1a016577.pdfIn PDF document text
    • https://gejejemimegi.weebly.com/uploads/1/3/4/8/134899280/basijiv_famapawov_ruzojevegoma.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479710/normal_5fe31bf952b50.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/world_map_printable_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5feaf0b958e38.pdfIn PDF document text
    • https://lalemudisezevo.weebly.com/uploads/1/3/4/3/134359520/de93e84a8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/principles_of_electric_circuits_9th_edition_solution_manual.pdfIn PDF document text
    • http://vejegaba.atwebpages.com/tagumonibos.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/savivivepesuse.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/44505147997.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_off0000edb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB7 5536 bytes
SHA-256: 408b3d649682ea8701b7cb000b9a238446283603d1ee10140000841cf4177641
font_01_sfnt_off0001009d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009D 10240 bytes
SHA-256: 3afc39f2a4f76f78a49e3e4f086287a437abcfa811acc2ee202982f047a02166

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