Malicious PDF — malware analysis report

Static analysis result for SHA-256 23ee34ea3f682b4e…

MALICIOUS

PDF

80.0 KB Created: 2021-07-17 22:10:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c191dbd820f048dc4dc420ad2130e01c SHA-1: c13a1e699ff0dd0f0efa02e3c6bd2468f8d720fa SHA-256: 23ee34ea3f682b4efab88d75fb93f2ff185f4395815b50282f90f9c4a336ce36
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to compromised WordPress sites, suggesting a link farm used for SEO manipulation or to distribute further malware. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6051

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://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095a025aec5e---34387372672.pdf In PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9b1cd6232---35205059812.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5689900a8---30963366930.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160847cacebd60---64912339524.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/a42581217f23c038a20de508375ab459/6897595205.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/5cb5f5f5b72c7a3508c2978eafb0b661/37770828977.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16093a56a415c5---8097453447.pdfIn PDF document text
    • http://bowlinggreenhsclassof66.com/clients/b/bd/bdf8ab256cd88a603fc2b95a051c5839/File/35749222782.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/9037152af4f81c044d0b96b9072109c9/jitilopusatoxamixukifid.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c85f63ece4---56991712314.pdfIn PDF document text
    • http://chinalanpa.com/images/upload/File/pavojolorufa.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/1f5e37a24f02f7cf397d65170caf28ee/letubuf.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/1c7vhonldeec99ah44k02qtboc/sodipum.pdfIn PDF document text
    • https://noddy.nu/images/file/66588187861.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/17546523173.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/dc70465de45791fb0a514d8f87f362bf/1655398567.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/99095939416.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607618e832233---livogogaruminiru.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/08c214d339d7f54acc1dc54afa7c5c2c/77820815678.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/59747f8f148d30edef1ff8567980ff01/31782963430.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afd193ce9d7---fepikux.pdfIn PDF document text
    • http://cpils.com/userfiles/file/31290523272.pdfIn PDF document text
    • http://vietthanhstone.com/images/news/file/sinonipuzufadawopul.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a9970d681---91363724055.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=repurpose+coffee+cansPDF 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_off000103c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C8 10380 bytes
SHA-256: aaec7aafcde5a547d0dead0cb5861d49517e1bcf11c71c5a53d8b16bdb7670d7