Malicious PDF — malware analysis report

Static analysis result for SHA-256 23186201eea6899a…

MALICIOUS

PDF

47.8 KB Created: 2021-09-04 05:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 78be6a6a009f045b7bd423cb230650d0 SHA-1: c8c11b8f3ef53951d9d9a19dcbbebbaa47c59aa0 SHA-256: 23186201eea6899a4938782bd2db102c57f2600e84b87f4adcbcf6e934412a78
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs pointing to compromised WordPress sites and other domains, indicating it functions as a link farm. Heuristics suggest this is a phishing or malware distribution attempt, with ClamAV specifically identifying it as 'Pdf.Phishing.Trojan'. The ML classifier also flagged it as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6441

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://secretinvitation.net/images/files/53017004064.pdf In PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/66126971864.pdfIn PDF document text
    • http://swaptoys.org/ckeditor/uploads/files/81077588264.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/7nqo55t5lpk9ecbfcjh4alh31g/23147655382.pdfIn PDF document text
    • http://azstorestudio.com/uploads/files/jevorikokoxavoriluxi.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d3f4dc7a5---risaz.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/dagowi.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/fegexavokakutukomidalujut.pdfIn PDF document text
    • https://www.sibirprokat.ru/ckfinder/userfiles/files/22596654767.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/180406a328af70a70882b5d7e05123d9/70887728625.pdfIn PDF document text
    • http://pscemetery.com/userfiles/file/pebop.pdfIn PDF document text
    • https://avenue102.com/uploads/file/4513900083.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/6not2oe4ipittj331dgnk2j665/wiwajove.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/nodab.pdfIn PDF document text
    • http://bidwoodmachine.com/d/files/43259250139.pdfIn PDF document text
    • http://kp-technik.cz/ckfinder/userfiles/files/62346738711.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/tenarejeparol.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1cbcbbd77---9303367474.pdfIn PDF document text
    • https://nordiskvillaventilation.dk/userfiles/file/tafurukunibinerokixima.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/40a1cf4e02420570487bc5faeceae208/43849104864.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/dd4gkr8d9l1n5hqbthispaak78/desojugi.pdfIn PDF document text
    • https://dgaspcsm.ro/ckfinder/userfiles/files/pafisoriditiru.pdfIn PDF document text
    • http://mujuerp.com/uploads/ckeditor/files/20210530170735.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/xogaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=dicionario+esperanto+portugues+pdfPDF link annotation