Malicious PDF — malware analysis report

Static analysis result for SHA-256 026db80a8c81c483…

MALICIOUS

PDF

76.1 KB Created: 2021-06-28 14:17:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 278c219e62b60c3c41c620a5d958862f SHA-1: 13ca267144908b7ee5165a9bd484cfa024dd44d9 SHA-256: 026db80a8c81c4835935a8a8363ae40a8302bcf120aa376dea458c3e11753ed2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm hosted on a compromised WordPress site, suggesting an attempt to lure users to external malicious resources. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7248

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://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607137e998442---17964406741.pdf In PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071acea671b1---kugefukadevupaxot.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/repiv.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/700242c581c199c54b93ca7957c71eea/65882679078.pdfIn PDF document text
    • http://remont-elektro.eu/archiv/file/fevomilimibidovog.pdfIn PDF document text
    • https://rosycaffe.com/file/87532709443.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b77040805---juxizomaw.pdfIn PDF document text
    • http://servmed.net/userfiles/file/9835223756.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d848554f995---vebutuvijumu.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/vvu4jbe8uefv2rc9f5u1bukp88/temuwitexaxek.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a42887b14cb---6170806833.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160af791ebcf7d---84637455952.pdfIn PDF document text
    • http://alphaconsultinggroup.us/vpw/images/file/32951365313.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/95319949.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/cc4436d116c004a4614e9896e169a019/texolobi.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/c44oag2dns8al0hmmcljis2sop/zisetu.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b30116960d---vinoxugogeruluseriguva.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bab9d605bd---gasatolamoxijeto.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089fb5425625---89470430316.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7cd3f1059c4fae06e71610f7954e9585/64556310449.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/8bh2ca5h8cb833pdiq3q0vq076/nusini.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/49760458391.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/dezonepifelatutedetin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=a+lesson+before+dying+endingPDF 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_off00010671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10671 16944 bytes
SHA-256: 23499b70a5abf612f0c796953a5a5f739a03cbf47ff73c26a991e63f1be3b781