Malicious PDF — malware analysis report

Static analysis result for SHA-256 3087c01f1fda65c3…

MALICIOUS

PDF

72.2 KB Created: 2021-06-09 08:37:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9d60948996a67dedb03d25aaa69252af SHA-1: 8a8e8ef864b5227208ee576494a752ab7c324957 SHA-256: 3087c01f1fda65c3104fa1a1c297491d7fc514980d90225ab2e14e4b10af7619
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8855

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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://pistant.ru/uplcv?utm_term=south+african+praise+and+worship+songs PDF link annotation
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/0jocu3njgrpnr46e2tfs612386/leriwegono.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/df666f1470c824d0fb4b4cdd72edbf99/34918014765.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b0186580956---71004867355.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160821a4d6933a---97082523603.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bd85b7702d4---58297645699.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/77406916737.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/f9e9e5da5d635c778529fe25949e1625/kavamuroloferaronib.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/4bc46744dd1cd02d5c3921109c9b6c62/xepiwuzijogi.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9ccdd403a3af8e928fd949a2de8b799c/93975992345.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/ecb27e6a8495a9820cadb5621cea4c36/61156872376.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/9a4bdb7fc03cbe667669a686b0191651/37305566454.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/07cc61367d423c189f0f0de7ef1a558b/88013580060.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16074149d5606f---94808500754.pdfIn PDF document text
    • https://frontlinetherapist.com/wp-content/plugins/super-forms/uploads/php/files/9639f857c47e5983a89b7c78b64e6e0f/98713169254.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/11556dc6c0df6f04ccc488f980b794c8/pilujomebewemopobi.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091420dd5c40---logewexanesibonijeramubu.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/e1369671a8e9d0cf8d0fba55f8f6779f/batapifug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ec60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC60 5460 bytes
SHA-256: ad73b1e534b3b7c4e31fcf300d00f295e841d406e11e9c37b36c0e265afbd9d2
font_01_sfnt_off0000fef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF7 11768 bytes
SHA-256: c508d0e93100cc461063099d398758df38b49e6b9b90443d77dbcc29d14d3ba5

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