Malicious PDF — malware analysis report

Static analysis result for SHA-256 c05c49eec962784f…

MALICIOUS

PDF

55.4 KB Created: 2021-09-11 21:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4db8cdbe6691aff8694dbcfa79546b75 SHA-1: 5f2367d5ee193cb70afeadc851a25ddf1708f29b SHA-256: c05c49eec962784fd7a738f7a94ec58b489867371124552645c61ad75bb21218
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable hosting and are structured as a link farm, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior. The presence of external URIs suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

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://oniceh.ru/uplcv?utm_term=nebulous+apk+download PDF link annotation
    • http://www.sas.edu.mn/ckfinder/userfiles/files/11922902263.pdfIn PDF document text
    • https://soechi.net/userfiles/file/6812232586.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/dojeloloxomapofokik.pdfIn PDF document text
    • https://matrixx.lu/images/lovopopupu.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/woxasesuwir.pdfIn PDF document text
    • http://shahnawazonline.com/uploads/files/54478875749.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/satowimo.pdfIn PDF document text
    • http://www.instalacionescueto.com/nueva/ckfinder/userfiles/files/73624906912.pdfIn PDF document text
    • https://nacituran.com/userfiles/file/gogokuxalofanakizudalow.pdfIn PDF document text
    • https://thisissati.com/userfiles/files/48592656878.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6e0eb880b---babalejanale.pdfIn PDF document text
    • http://www.sushmitamukherjee.com/fckimages/file/josetisasek.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/bavisugedatewaxibovipe.pdfIn PDF document text
    • http://www.cemeba.com/uploads/ckfinder/files/gatinojerisajozur.pdfIn PDF document text
    • http://chaputlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/6782177635.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/dobujuvupegogomiju.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/dizibu.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/73508109440.pdfIn PDF document text
    • http://autolavaggiocraparotta.it/userfiles/files/dosoxonasunabiwo.pdfIn PDF document text
    • http://candientushinko.com/images/file/pibor.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613abd73a7d8f---fozasapomexefel.pdfIn PDF document text
    • http://stluciachamber.org/uploadedImages/contentImg/file/javuvebepivusolowisan.pdfIn PDF document text
    • http://llux.vn/uploads/files/68101088050.pdfIn PDF document text
    • http://spiregene.com/image/files/20210904_223706.pdfIn PDF document text