Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdaf7c6dbfacd7c6…

MALICIOUS

PDF

79.0 KB Created: 2021-09-15 17:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 826836047c0fb8693096de4d6a5fedeb SHA-1: 8ce2232b4c70e4d6498f9823d09a7522470f13f2 SHA-256: fdaf7c6dbfacd7c61cac8cdfb621ab6a50ff3dc8e76465b54b9c66d5e678708c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised CMS upload directories and disposable hosting, indicating a link farm designed to distribute further malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The presence of embedded URLs and the structure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6156

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://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a4905407c4---dogumukolubo.pdf In PDF document text
    • http://boletos.luzservicos.com/ckfinder/userfiles/files/5333340752.pdfIn PDF document text
    • https://telenovella-bg.com/files/89213256430.pdfIn PDF document text
    • http://bakefruit.com/uploads/files/202109051436161229.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16137959f22562---fozarozoj.pdfIn PDF document text
    • https://fasaac.org/temp/files/56675006829.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/xepirebugusunu.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c51987279f---fevedepijozav.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e87724e438---vubufufinuzixavumekifoju.pdfIn PDF document text
    • http://mirutte.com/newsfiles/files/94846920158.pdfIn PDF document text
    • http://abpjseah.news-read.com/upload/files/tigupamerivawivuf.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/78990031067.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/472675570.pdfIn PDF document text
    • http://villaroyalenews.com/userimages/39352266819.pdfIn PDF document text
    • https://pasarangroup1.com/contents/files/zefuwu.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612eced98a132---mabalofasupesaraweto.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613557021f841---muvepiwopamifarew.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c393e6dfeb---12512782290.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130a0754c340---zowilupegibixuvovajuni.pdfIn PDF document text
    • https://ripedzn.com/app/webroot/files/fckeditor/file/dekifirotubokamev.pdfIn PDF document text
    • http://vecsecity.info/editor_up/92483460602.pdfIn PDF document text
    • https://www.eos.org.eg/ckfinder/userfiles/files/36953150876.pdfIn PDF document text
    • https://mkontroll.hu/File/fakubasegizeponovet.pdfIn PDF document text
    • http://iscelenie.info/files/file/5038328943.pdfIn PDF document text
    • http://ttmplus.com/userfiles/files/38971458765.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=movies+hd+2021+apkPDF link annotation
    • 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_off0000df9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AF 18428 bytes
SHA-256: 2b0cfb939d3c8938bc119cae527a9ab8adf2589aa58462b9c0db6f578577f8d3
font_02_sfnt_off000127cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127CF 10588 bytes
SHA-256: 26f609e3de9fc96bc06098918834843c890a52d55da6d0e510c74781cd6cf577