Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1e487b413a8d4d…

MALICIOUS

PDF

86.0 KB Created: 2021-07-08 00:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e9c9677f4f5128697994b95c30a75544 SHA-1: 5d5769b6b4c2e8c440ed7a8fddbe8ad439752061 SHA-256: 9d1e487b413a8d4db31fb900f7d78c0679ddc1902bc5043b7f7b0e711e508f7e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicative of a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with a PDF-based phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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
  • 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://irlanc.ru/uplcv?utm_term=civil+marriage+officiant PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bbbbb581ea---81041603730.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160af3bbea4012---rivufusekuzod.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/9e95e13103f046c605722f370f8a0b95/munilufuzerenusozalukib.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/rexumu.pdfIn PDF document text
    • http://cartopack.com/Images/file/65773913556.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d510401da2---lojimegofud.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d6ad347d5---26885511072.pdfIn PDF document text
    • http://cosmic-kino.ru/sadm_files/gagazavazov.pdfIn PDF document text
    • https://santechnikosdarbai.lt/images/files/81566406955.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0e846d2e75---zomixewi.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/6e9e436af8efd3642c55fc52fab0751e/tabaze.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/87dd17e9e6d128c4883139b25ce4977d/ramumivutubixiligevutes.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16096398d33bc6---16315258409.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/unvbv5r62239monq8hue4pkn2j/dujavevopokovuganipa.pdfIn PDF document text
    • http://kawoka.com/userfiles/file/99569995407.pdfIn PDF document text
    • http://hattingtoemrerogsnedker.dk/userfiles/file/zapeja.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/r4tudigji6hdv45r7e5hanp614/keropuxoreweganebitujuxu.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091838d54087---bomuzamobawekuzajozosefi.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/wawuzexifosoxasojut.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/zapanopiraga.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160d5387be0dad---sezojevosulo.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0013820001620031369.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/2959104588.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/sovelonu.pdfIn PDF document text
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/d0582dmtv07hull021v52aogf3/66575630443.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED68 10608 bytes
SHA-256: 76a4bef8650bd2dbb136358ce2bfe6404ef3e2c10cdbe2c02d9760b0deb6b90e
font_01_sfnt_off000105a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A7 17560 bytes
SHA-256: 6b0e474744ee653fe066886d34f41e8969271896bf7f23e3db67aad0425240da
font_02_sfnt_off000132d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1