Malicious PDF — malware analysis report

Static analysis result for SHA-256 4458fa5b8873776d…

MALICIOUS

PDF

132.9 KB Created: 2022-03-28 11:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: cf4a269f0670abc8af42d89e62f80d4a SHA-1: 290d7bc409dd70b1153567f3815e5b9d4d6af5bd SHA-256: 4458fa5b8873776d1558ede44d69b9676f0ba0b5946e7f3986a98f54f36d2d56
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites or disposable domains. The presence of numerous links and the use of UTM parameters suggest an attempt to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7640

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 https://yoyep.co.za/XSRYdR1H?utm_term=modelos+mecanicos+y+organicos+del+dise%C3%B1o+organizacional+autores PDF link annotation
    • http://vodokanal-proh.ru/files/files/75745732977.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/162365607298c0---58441637729.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/1b0c0c890ed79aa6e786613c3d75d894/34307584820.pdfIn PDF document text
    • https://jurvamartin.com/userfiles/file/87397923235.pdfIn PDF document text
    • http://limobebe.com/userfiles/files/gusimasozibunubozugazoru.pdfIn PDF document text
    • http://confidenzacsapagy.hu/upload/bolatasavukekovisixopot.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/fafikuwijas.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16223c0aabab92---8838698390.pdfIn PDF document text
    • http://www.oiseaubleu-promo.fr/userfiles/file/dazobufa.pdfIn PDF document text
    • http://investgeorgia.ge/userfiles/file/66247471635.pdfIn PDF document text
    • http://www.mswest.co.jp/cmsdesigner/kcfinder/upload/files/jivotojivakoseb.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/80f65d036debc2eca01e26d9255b918b/maturefemolevutizuxuxav.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2022031721054373499.pdfIn PDF document text
    • http://tdjl.com/uploadfile/file///2022022321471792.pdfIn PDF document text
    • http://gitral.fr/upload/userfiles/files/vobekebo.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1621a1567c3ce5---23965041565.pdfIn PDF document text
    • http://ovodaprojekt.lenti.hu/feltoltes/files/6037626864.pdfIn PDF document text
    • https://www.datacom.com.br/assets/admin/ckeditor/kcfinder/upload/files/zefirufupakivapujisolute.pdfIn PDF document text
    • http://jrecchina.com/ckeditor/ckfinder/userfiles/files/84273169821.pdfIn PDF document text
    • http://werkschoenenverkoop.nl/images/docman/files/78287263799.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///fowudarojatimarofu.pdfIn PDF document text
    • http://stapi.org/assets/kcfinder/upload/files/tetojegimu.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/vuwadifatanexizi.pdfIn PDF document text
    • http://favourtec.com/attachment/file/79341943967.pdfIn PDF document text
    • http://www.cddfct.com/up_files/file/wabag.pdfIn PDF document text
    • https://fp-004.flexxmedien.com/flexxtrader/data/usf/file/nepasixomadakisusomimoke.pdfIn PDF document text
    • http://raudhatuljannah-gma.com/assets/kcfinder/upload/files/48263314405.pdfIn PDF document text
    • https://www.area-tlc.com/public/ckfinder/userfiles/files/28935946364.pdfIn PDF document text
    • http://ipsc-pv.cz/kcfinder/upload/files/novevokasow.pdfIn PDF document text
    • https://rosenstein.lu/userfiles/files/14794128496.pdfIn PDF document text
    • http://holflorstudio1.cz/upload/files/55192565800.pdfIn PDF document text
    • http://reedleisureproducts.ca/site-uploads/93245052239.pdfIn PDF document text
    • http://kungfubp.hu/admin/assets/images/files/75674721250.pdfIn PDF document text
    • https://ice-group.pl/userfiles/file/mosujawivurupitedovugodu.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/98f7c50737ac2099a6b16dfa34cc009e/48755017034.pdfIn PDF document text
    • https://demetraproject.eu/ckfinder/userfiles/files/24245036273.pdfIn PDF document text
    • https://ajur.rest/uploads/userfiles/file/95708580659.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://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_off00017f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F65 23476 bytes
SHA-256: 9c8a21003b3ef79c3f08b99a84bb7bd75b810bc0f92a2bd950dd6504265946a0
font_01_sfnt_off0001b9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B9FF 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off0001d119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D119 16060 bytes
SHA-256: 64af0185a2beffa7382febdf957b2ddd2015d3985e5bc97cf8ad64f3c2914973
font_03_sfnt_off0001e62f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E62F 11188 bytes
SHA-256: 2b51433e7811880083e9817c4defdb8991b6929d6be401730cfa317f7f028ca4