Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a1363711de80e9…

MALICIOUS

PDF

70.7 KB Created: 2021-09-01 23:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ee8f3d4d0e456ebc9648f30516aaac5f SHA-1: 8eec2ea5b40dbafd8cac29841b6c717b80db9caf SHA-256: 32a1363711de80e94ad85863892ac76de40fac14fb71aba44e0577948fa9457d
154 Risk Score

Malware Insights

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

This PDF was detected as a phishing trojan by ClamAV and flagged by an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other potentially malicious sites. The primary purpose appears to be directing users to external resources that likely host malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8939

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e32b66627ec---dekupanufotimutamuj.pdf In PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/cobc6j33tmk5h96780v01unouf/bomitajiruvasovuwo.pdfIn PDF document text
    • https://reitinguok.lt/userfiles/file/48406188499.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/g23kmu90sljomi2qbfnop98ips/54327327828.pdfIn PDF document text
    • http://tuzy.pl/Upload/file/55205329090.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/d150ea7e9e4c2ad2157a4978552a8109/35633066.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16084e81266b35---lijoritewalidisidekiru.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/6294755804.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e19c7135d8c---nufeseba.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/4828956374.pdfIn PDF document text
    • http://immopolignano.lu/images/66026785377.pdfIn PDF document text
    • http://storemisr.com/uploads/files/nupuwigedud.pdfIn PDF document text
    • http://cunningham-reunion.com/clients/7/73/7399477c88ef979e1ad3ac38e42cffcc/File/98796805127.pdfIn PDF document text
    • https://granitabrasive.com/editor_up/49616378586.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d22827b26d4---wabefafijawodakavaj.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6e56fe3a2a4cc554e247cf370e0a6fa0/punilunuwe.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/co6ng7g1uds8r4e1mb7m8l94vp/rimikataza.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/9aqml2ea0gj4d98o6dbkdt00o1/3748076516.pdfIn PDF document text
    • http://xn--b1agpbmdtf.xn--p1ai/upload/file/12119483810.pdfIn PDF document text
    • https://efficientinfocomm.com/ckfinder/userfiles/files/vigawovubudar.pdfIn PDF document text
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/molobesukazawikifa.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/37291322210.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a73e973db46---25580405856.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/578d2055209aa5ad4f0ab379f043fc56/lojazivalerekig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=corrosion+of+metals+can+be+preventedPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e03c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03C 17060 bytes
SHA-256: acedfac2cd91ffc18163970734e2add9ed0242cc4fea1f94019f31975f23f887