Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cbf26cb14fa5688…

MALICIOUS

PDF

394.5 KB Created: 2021-06-10 07:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 341378d64fbf3ed5e6c3da88470bf1dc SHA-1: a2e62d05374616937e0c8d40d96609296d99b741 SHA-256: 5cbf26cb14fa5688efc1e3b913f35c1b5932707770bdb438ddf88eaa049df7c9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, which are likely used to host phishing pages or distribute further malware. The presence of multiple distinct hosts and URLs suggests a link farm designed to evade detection and maximize reach.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9815

Heuristics 5

  • 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 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.
  • 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://pistant.ru/uplcv?utm_term=lr+mod+full+preset PDF link annotation
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa08748eba---22454337257.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/2e06d8a6ef939cc9c64959b5ce7f53d6/dubitapujezamu.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/55d746756f54b5680596b7ebee518925/93641984599.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160a895dcd7ca3---sawowipowasefiberinufu.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706f14ce678---8827062593.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/iqoo1l4fruakc1b1j45qnll0o3/fotivugotox.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607995dc25a52---getawe.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/9d3d41e8a9861fa15a847adcb98b34c8/sujodemosowapekozale.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0bd8ba3b1f48a7b8785faef482dc46eb/puvavuzasenuvafojezap.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f61ed23a6---lozejujosip.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084267d7d8ec---nugipukos.pdfIn PDF document text
    • http://hopkinshigh62.com/clients/7/77/7764523e397120ad9b09b1da26998858/File/3973828701.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff5db58941---70966144617.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/86694781678.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a5312d1dc---tunesasosefelofija.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_off0005dd51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD51 4916 bytes
SHA-256: d6501156e91f39bf19f77643cb9c606cb4d92a965143603e8dea44d5da2610a3
font_01_sfnt_off0005edfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDFB 12752 bytes
SHA-256: cc4a0c214d48c5f7a82ad8d10b6ca13c99fd8398b8b559b987b21032fd844739

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