Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a781d3bbd81cdd…

MALICIOUS

PDF

100.7 KB Created: 2021-06-27 06:15:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: b9c226fdf93c57c64268b2610053e7fe SHA-1: b8054687693f21485ad5d430eb31e7a9133dd86a SHA-256: 68a781d3bbd81cdd4b4b8ecefa0a1ab9cd8e4324b134bbc692f83ddd6eaa034d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9896

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
  • 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
  • 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 http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4a90d9a5c---sazozuvugumikerodawifis.pdf In PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/a58617a9e88e53a2a95a322f7954c54c/xalorijipudeposu.pdfIn PDF document text
    • http://clearspace-design.com/CKEdit/upload/files/rubetur.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606c99e995104---buwozuta.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071a653a9cdb---xanebofolelazowos.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/kamefoxanugimawivi.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a494205dc7---30491371773.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210603_193444.pdfIn PDF document text
    • http://czechdidgeridoo.com/admin/upload/file/495939777.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/zejopabimisadeguwivujebi.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606c94efa86be---66080912830.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e87071535---musulajakopabelupovejowi.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/gbic6atva2ro1mela8v16e8dt0/ranududitiwenesadoje.pdfIn PDF document text
    • http://standardamulet.com/files/files/97416160330.pdfIn PDF document text
    • http://statewideroadservices.com/clients/879378/File/5015721247.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/82898018099.pdfIn PDF document text
    • http://sevinctekstil.com/resimler/files/98763954365.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/lc05hes9927scnherr1qp34e6i/jomigo.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609b009cd4355---duvetuxuvovarabedo.pdfIn PDF document text
    • https://cesiedizioni.com/userfiles/file/puforewoma.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/d679922715987b5d108802d74922cacd/mixuwaseminedid.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160aaedaf1c3f5---66871253835.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/1nreliu1qnvusjph1atlo7c8u4/kufexoxesuwezasajujite.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/74522464705.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=a+%26+p+short+story+questions+and+answersPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF723 9056 bytes
SHA-256: 4f8e2e9d4b651e77531a0b1316c619995dd92a166bcb5f70378897cb0f848172
font_01_sfnt_off000109a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A5 16944 bytes
SHA-256: 06bddf9b5a5440470266105182a11957c2b07fc3919ce18e5b4927025db795fd
font_02_sfnt_off0001225e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1225E 34760 bytes
SHA-256: eae6ecbfea03af876aafa401a95b0b2aecca53bcbe795a53638be4a2c7b1c22f
font_03_sfnt_off00016d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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