Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c26691259ff4cee…

MALICIOUS

PDF

71.3 KB Created: 2021-09-05 09:04:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a3818922785ee474f0d9a5725c4859c9 SHA-1: 34bf6053af7b0ce19e59460306d00cb7bd5560eb SHA-256: 0c26691259ff4cee101a8566d0aa028187d3f93c9c6dbdee95728032d7a79fe8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress upload directories, indicating a link farm designed to redirect users to potentially harmful content. The presence of these links suggests an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075906052112---xaboj.pdf In PDF document text
    • http://shshalloffame.com/clients/9/93/936f23dc4abb03f6d4a1aae2c8a32781/File/zowizebepexat.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830d0d7c004---zuzaretitiwokovif.pdfIn PDF document text
    • http://eastindiaspray.com/suvra/eastindia_spray/files/87777383980.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/44863221087.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/58090215318.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/fevojakiduxomivudofob.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/20f3d152b3844597560d93ebbaa28b25/kogijenaginowutubawimo.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609de5c6c917c---56103048971.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/90e592ad6a53d3b2d9a6b4c84b32b103/fumosezo.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/f5da3d68a8d89398344305da095b32f1/62043597217.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/2564h5mm4retpuus2o4vr73k6b/motuxomarojorakakube.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/45059712295.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d9676cbf65e---nufibodos.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/8636f43360deed0d2b90302a12a14671/kekuxowufitagonutowewi.pdfIn PDF document text
    • http://starwindows.ie/ckfinder/userfiles/files/49770271442.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/drd71csbmfim58nonah9s6coif/30135326831.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1611740d29dd1c---84234829326.pdfIn PDF document text
    • http://weddingdiy.cc/uploadfiles/files/20210605_010503_7104.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/92594950162.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/lagavopezedotaret.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a3bcd296e---69137563039.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/retujo.pdfIn PDF document text
    • https://kurashi-kyoiku.com/cms/dat/upimg/file/tidewivekexowok.pdfIn PDF document text
    • http://secoinblock.com/upload/files/nofor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=sans+course+roadmap+pdfPDF 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_off0000b80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB80D 10720 bytes
SHA-256: c9465bb8bb3b81851d138f2559121d80dfb08cfe6e51922b2a28c835ca21847c
font_01_sfnt_off0000d098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD098 15568 bytes
SHA-256: 79841df6aa80a1b12ac39696ab26d29457605d43839adebe7bb9719df9b610d1
font_02_sfnt_off0000f7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1