Malicious PDF — malware analysis report

Static analysis result for SHA-256 27690a741dc2e34d…

MALICIOUS

PDF

76.2 KB Created: 2021-07-17 14:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ac2e8b1242e41c23f64e601bca0d72f7 SHA-1: aa7154accef3cafe6a3363ca994bfc89a820205f SHA-256: 27690a741dc2e34df4bfeed4b146ab7b796e55c19c0c54f9101eaa37e5a8ce73
154 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to other PDF files hosted on compromised WordPress sites, indicating a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a common distribution method.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8282

Heuristics 5

  • 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
  • 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://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa4b07b335---duvibuzufizagut.pdf In PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/17f3d1b8c74b74fd5723a0c2b505e4a5/60530559017.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/a3c2d972ecd830c1c5862270d6323595/fojifuj.pdfIn PDF document text
    • https://koffiewarenhuis.nl/app/webroot/files/userfiles/files/tiruvujasokanoradomekum.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/pagasawixidopusuriwigi.pdfIn PDF document text
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/2104ea62533ced282b1e168d553fc3f9/26742618991.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/o03eb9er6232tchfs5835jvss0/43888755881.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/igk3t6ohod5jb4jl71j02aco04/vavegisakexow.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/76bacf93510bdad2103adaef8abe419a/mababeweror.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160793b43984da---44620981963.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/rivuvugipi.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/078f4ae496918c888cdd6a02f66e017c/sawibujokedagor.pdfIn PDF document text
    • https://rozgarnetwork.com/ckfinder/userfiles/files/17580449104.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/0587c89d377ff32ad6429664605c276f/dirusovomopipumefi.pdfIn PDF document text
    • http://myphamhelios.vn/luutru/files/navokulunizo.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/tedewexezekiwunug.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608183906b0a5---malegivozinuliwis.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ab84d26fc94---sixufovit.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/5a5f5833e6dd16300b6d61580a5a1768/65136508939.pdfIn PDF document text
    • http://pagyesa.org/userfiles/file/20210626032913.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/87171912563.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=valid+essentials+of+contractPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/adf3a328f68ec3e94d2e1405422fea19/43788960936.pdfIn PDF document text
    • 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_off0000f725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF725 10436 bytes
SHA-256: d95f7e0c2ada39537db02520f8c4d89a626d04075c821e9f90db2fc27c9df91a