Malicious PDF — malware analysis report

Static analysis result for SHA-256 2066367558d941b7…

MALICIOUS

PDF

70.7 KB Created: 2021-10-09 21:13:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b408daf67930d7234b479c2d3de74283 SHA-1: c66f3296fced397b2acae853a96f6ec4c967beb0 SHA-256: 2066367558d941b7e6f85fd837e4e145068857e1a82b984d32b46c2eb3038d8e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV and an ML classifier as malicious. It contains a large number of embedded URLs, many of which point to disposable hosting, indicating a link farm designed to redirect users. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically identifies this pattern. While no scripts were extracted, the sheer volume of suspicious URLs suggests a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6398

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://synerhu.ru/uplcv?utm_term=baby+pink+colour+for+bedroom PDF link annotation
    • http://www.nomorcantikjoss.com/file/tufup.pdfIn PDF document text
    • http://smsalumni1971.com/apadmin/uploads/userfiles/files/dezilepebesure.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16142990dd8175---kuvibizokozonubugosikuku.pdfIn PDF document text
    • http://ingore.cn/upload/files/gopewanifoluxopamikumi.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/diwarugubumofowaga.pdfIn PDF document text
    • http://language-coach.pl/uploads/files/8096366362.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/gezefu.pdfIn PDF document text
    • https://trystsalonri.com/images/file/kejigagusanodorevidit.pdfIn PDF document text
    • http://lamgi.pl/ckfinder/userfiles/files/fodupilabogugilulebiw.pdfIn PDF document text
    • https://pvcmikser.com/upload/files/mipekoxizafazorunodobagaj.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139fd796f652---pasamofiviwikij.pdfIn PDF document text
    • http://inspeq.eu/public/files/87123285664.pdfIn PDF document text
    • http://domki-kopalino.pl/pliki/50415828525.pdfIn PDF document text
    • https://matricula.arendic.cl/files/mapisifogojusefujaxiw.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///tidiveremas.pdfIn PDF document text
    • https://harmony-lazienka.pl/Upload/file/zavuxake.pdfIn PDF document text
    • https://partetesal.ir/data/file/nibaburafipa.pdfIn PDF document text
    • http://ydtmuhendislik.com/ckfinder/userfiles/files/selibufetofaroj.pdfIn PDF document text
    • https://producedepot.us/userfiles/files/rugap.pdfIn PDF document text
    • https://kanalprofi.at/UserFiles/file/vosakujalilababuvo.pdfIn PDF document text
    • http://nomayaku.com/userfiles/file/topudajukekoxufasidilover.pdfIn PDF document text
    • http://a9188.com/upload_files/art_files/files/20210908_034012.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/lesaxolasetoponugos.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/68873553689.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/zuxafe.pdfIn PDF document text