Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac081a6c92427d1…

MALICIOUS

PDF

81.8 KB Created: 2021-09-02 16:29:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e484b0ac4bb02c10b9b3b5c39f307cfb SHA-1: 79a975b80dffdcdcd84351408e54147647a5c57c SHA-256: 7ac081a6c92427d19ab86d3427fa76efeedc4aeeaac9524626aa3f5e4a5333cf
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised WordPress sites or disposable hosting. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are designed to host phishing content or further malware. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5648

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16100d72259016---pefowinepoxoze.pdf In PDF document text
    • https://leanuslab.com/UserFiles/file/kojurikenugijefa.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/kokunarinide.pdfIn PDF document text
    • http://dlshixiang.com.cn/ckfinder/userfiles/files/bejazaxumugununegasowimop.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/alam1aenropkdi2fnmc83fvq0h/84257596880.pdfIn PDF document text
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dotizaruw.pdfIn PDF document text
    • http://jdjfjx.com/images/upload/File/jipesa.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/1e65a44924e2422602a6553e98aa2fc4/51941005923.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/74822084769.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/nisovfri1d8l7rhp54a2n9se33/41857797228.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084d130342e8---80154149632.pdfIn PDF document text
    • http://kappp.ru/js/ckfinder/userfiles/files/pawokefazosavasupijonuben.pdfIn PDF document text
    • https://www.esicm-old.org/admin/lib/ckfinder/userfiles/files/99372675937.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/24185490935.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1b9407fe1---juxetajinonatabopam.pdfIn PDF document text
    • http://ulsantour.com/FileData/ckfinder/files/20210727_8E11868BB1B7DFF5.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/6b9e51a8345d7d2809b6c56762fba70e/66717561824.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/vezoxedox.pdfIn PDF document text
    • https://mgs-on-track.com/uploads/misc/files/70899017509.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16078ee388729d---43332525653.pdfIn PDF document text
    • http://globalaircrafttech.com/ckupload/files/jonakovuvejezer.pdfIn PDF document text
    • http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/81467542896.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/23890567195.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=phaedo+text+pdfPDF 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_off0001222e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1222E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.