Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dc23f71b2c5b40e…

MALICIOUS

PDF

104.0 KB Created: 2021-08-26 22:57:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-30
MD5: fef875bbcb8ac8db08cdf698dfd2eb69 SHA-1: 392607b6a8c2603a0d93991fef1df1e39552ee23 SHA-256: 1dc23f71b2c5b40e9f3cd166f7a5ac6663be692d0af1603c6c336bff4d9cc4cd
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9867

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/ragmp7jev6ua0vnkda8e8lt911/16973417247.pdf In PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/563e2c83b6089f8e0d7e05404c72fc0a/34778973245.pdfIn PDF document text
    • http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210519143923933953pk4r83.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/20217261518349523.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/lepotupesejit.pdfIn PDF document text
    • http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/29389262997.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16081f43c72e9d---70277310333.pdfIn PDF document text
    • https://ikima.fr/uploads/file/81898482284.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1371b2c90---53187882742.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/laqbdfgfhv8gbfeg3282i1aaf3/52718271554.pdfIn PDF document text
    • http://lacyfamilyunity.com/clients/2/20/203fd950dafdada58ea32e7b96f0d147/File/44954611398.pdfIn PDF document text
    • https://prospr.fr/ckfinder/userfiles/files/fefumotuvatod.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f740fd3074---pukojijuloxusadorawenobav.pdfIn PDF document text
    • https://cmfnepal.org/userfiles/files/pumamigubamilijelosora.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/k7j4rr9e13grmmgp45ntie4pnt/pitikupola.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b395b4824---dokewun.pdfIn PDF document text
    • http://torgoborud.org/images/file/42309613404.pdfIn PDF document text
    • http://newkontakt.ru/userfiles/images/file/21000639388.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16086e05b116d1---xujifusubu.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606f62e5b749b---93932337135.pdfIn PDF document text
    • https://monyetmesum.com/contents//files/wudisitavigogufupodefu.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16075c5bb430e3---gemaf.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109d96b8e930---zarujomanud.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/pukonaroval.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/663n7pli451uqbvu1e8pngva7d/89693465312.pdfIn PDF document text
    • http://greece-ex.com/images/blog//file/livomokizugivavim.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160976ba06077b---3351144447.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=63+kg+in+poundsPDF 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_off0001347a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1347A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C91 10464 bytes
SHA-256: a77354f84421ab460fe59c9529a44b045378313412745dd0b05e37aa91f64b6c
font_02_sfnt_off0001642b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1642B 17692 bytes
SHA-256: 3608e513f3d2ed0c54941c956bef0d1b64195395314fd508d300f4bba7672b5d