Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e91e1fea9e36d03…

MALICIOUS

PDF

63.6 KB Created: 2021-09-02 07:11:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e1b74b5828823a3bbcf6e95b73ade44b SHA-1: c377f225a58627b84aa86c11b9e3374117789c4c SHA-256: 5e91e1fea9e36d0346ff7212c06f2ed8cb97a3c1311178651638efb798c52433
94 Risk Score

Malware Insights

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

The sample is a PDF document identified as a link farm, containing numerous URLs pointing to compromised WordPress sites. These sites are likely hosting further malicious content or redirecting users to malicious payloads. The ML classifier strongly indicated maliciousness, and the heuristics confirm the presence of a link farm on disposable hosting, suggesting a distribution mechanism for malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9193

Heuristics 4

  • 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 https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/8lv1pi9lvt5q84h3mtckhcpqa1/bevubawifosajudig.pdf In PDF document text
    • http://tnmetalworks.com/images/files/wedelanuxelux.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611b869e63066---94241133352.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7f6fde3dcc60824f049906ad0e62da95/27328409257.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838efead713---sepasomadimuwabig.pdfIn PDF document text
    • https://westhigienia.hu/editor_up/54511777367.pdfIn PDF document text
    • http://mamitobe.ru/files/file/tifolakinurulodala.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/66721506035.pdfIn PDF document text
    • https://shipnhanh247.vn/asset/files/15536953282.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/85f0621c541d51d864e67358b7261dae/35016909065.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/limonalijeb.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/40819538779.pdfIn PDF document text
    • http://yoron.net/up/files/3701062398.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160adb5e8438b8---zozupuposimevupibip.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/jekusaj.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb9f513e6e---tawinalazeze.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/89957821184.pdfIn PDF document text
    • http://temple.mo/userfiles/file/keretutakisonef.pdfIn PDF document text
    • http://manvilastrust-org.bvirani.com/ckfinder/userfiles/files/rogida.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/nelitifa.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/defutupopoporoboma.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/51n9805krjh3sb9gj3f6bcrdrj/36102984546.pdfIn PDF document text
    • http://wib24-admin.de/uploads/file/53462837920.pdfIn PDF document text
    • https://kientrucqhouse.com/uploads/image/files/pategogudepusape.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=nonfiction+book+report+examplePDF 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_off0000e2fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FE 10784 bytes
SHA-256: 207245cd2679209dfb85247b8beddf63a670bb27a9b89341d7d641c172742330

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