Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca73c0e8a2b3d6bd…

MALICIOUS

PDF

85.6 KB Created: 2021-06-26 02:11:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 1ff137a73c1f4462c0f991e90bdc9c0f SHA-1: ddeba1afe2782cbf0ce935ed68f6fb10d15d5dd2 SHA-256: ca73c0e8a2b3d6bd070ee03cbe72b6f08648ac937adfc72abb3829d8dadeb8cf
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack pattern involves directing users to these compromised hosts, which likely serve further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16093cfdc142fb---62565299644.pdf In PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16090373ac099e---vofefojopajuda.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/bakelodavewasekeguxawota.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/digimojijodomaraboritidu.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/f62096f6f7f75195891e163df56d07c3/doxikimufesozi.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/16722787175.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/zobinameta.pdfIn PDF document text
    • https://actor-conseil.com/files/file/82533614600.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/g0ff9u2p4k5b67sj0ibnrl2tck/sedagopusubetid.pdfIn PDF document text
    • http://dogalakustik.com/depo/sayfaresim/file/ratajarimusebemumanafas.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/239a1bd8b3041264fa4fae2675053473/tuliribisemexovowoma.pdfIn PDF document text
    • http://ktcz.eu/files/files/72553462663.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/c19c1b594b22baa46be7274fea51c6c1/61032508575.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/8maq06ittmae7i528cbratjk32/fidufazavirokidotisoduje.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160786a0639b98---73088931433.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/ik6fcudvjcj8a8469gglf6u6ug/gugol.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/tobezogopotap.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606eca8f7de19---98602418072.pdfIn PDF document text
    • http://westleyden72reunion.com/clients/4/46/469dc9162705cbff2d1fbe132f144f37/File/51026384525.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/5b7febbd0a398c58aadd3eddf71ec091/8505593979.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/2c4e732308785ec8e6fd7bea121a7ed8/tavagajozivakewaworobom.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aae21d6e36---18384684559.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/157b47cc5ec769c32872d3d7ae7f0bab/96637155077.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=pf+joint+declaration+form+in+word+formatPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB89 10684 bytes
SHA-256: bab6212fab4991367e2641a9d0519e1df4e7a1ddeef9d030419f2494e8b514f5
font_01_sfnt_off000103f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0B 17172 bytes
SHA-256: 9edccf600d62855f366584d956c32036b27dc1887c6e6a1e3edd6c3050a1b352

Open this report in the interactive analyzer, or submit your own file for analysis.