Malicious PDF — malware analysis report

Static analysis result for SHA-256 86dc7ff9f6f7ee99…

MALICIOUS

PDF

89.1 KB Created: 2021-07-14 10:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d96e6d0456055898d3a396892252c8d8 SHA-1: e427ff52dc639cd215c2427c494b9c9df49bd5a2 SHA-256: 86dc7ff9f6f7ee99639ad6ae8439c28a57feb4615c3101c2c0d90663fe8c40c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is heavily obfuscated and does not provide clear instructions, but the presence of numerous external links, many hosted on compromised CMS platforms, is the primary indicator of the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f58ec54c90---38708158297.pdf In PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f062a903cb---vimedekal.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/29174802725.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/xaxobij.pdfIn PDF document text
    • http://guchenes.com/d/files/sijipumupapimowagubavo.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/9vkfnatdlre4inqijt1i5p3ru4/50349338853.pdfIn PDF document text
    • http://funperm.ru/content/file/nukaliramawomemolafut.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/our25fvt0r0b737c8hc21956p4/46546892886.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/41186497523.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/cc89512e4f164bea047808de10c30062/nezupa.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/41387873454.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202105/file/1621481914.pdfIn PDF document text
    • http://kme-kme.cz/files/file/nuwajerogoluse.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/dtoclmhkqa2fsk1l5oc2niht7b/4405935813.pdfIn PDF document text
    • http://toddfamilyreunion.com/clients/4/48/482e924d5a052aa4a0c13eb8a30e0bc8/File/11346261532.pdfIn PDF document text
    • http://praxis-greve-polley.de/web/editor/files/suwixakumoxutejoje.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608149e3c0868---rotawumijafu.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4069576521---wonorijefa.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/91111068387.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/65135562349.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/0426m0bk4rcv4qq0qnh01bdqjo/4988848611.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/99238d5efb654ec5fe341df46e63ae5f/74873539296.pdfIn PDF document text
    • http://studio-orlandini.com/userfiles/files/55617532193.pdfIn PDF document text
    • https://healthcareadvisorsgroup.com/wp-content/plugins/super-forms/uploads/php/files/0745itdkf65dtegg0h1p10ekq6/90078082603.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=yes+in+noPDF 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_off0000f647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF647 20976 bytes
SHA-256: df4f9749cba943f5ed1a863c9f1d043c2d674a3c7e4801879c2fb18d4b843827
font_01_sfnt_off000128f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F3 9680 bytes
SHA-256: 17ee75e1a97d6b544d59255f6780205290a733a6466cf90a729ab38aa915b8af
font_02_sfnt_off00013e1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1