Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e860d832a00b42…

MALICIOUS

PDF

44.1 KB Created: 2021-09-21 04:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: de52e6210e9897fe8aa88209451fdd8f SHA-1: a23797f139b7d39166c22500d744eb53c3609f0d SHA-256: 17e860d832a00b4254642af9f297ff1287030ed0b5e03a7c16cdb32650ff44e1
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript, which is a common technique for exploiting vulnerabilities or delivering malicious content. The PDF also contains a high number of external URIs, many of which point to unknown or potentially malicious domains, suggesting a link farm or phishing lure. The ClamAV detection further confirms its malicious nature, identifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://xinxinhouseware.com/uploadfile/files/gowubaruxuzozozagakima.pdf In PDF document text
    • https://www.eos.org.eg/ckfinder/userfiles/files/xipesiguxegirebefufibewov.pdfIn PDF document text
    • http://hoangminhsaigon.vn/@dmin/js/ckfinder/userfiles/files/midipudibuzofafukis.pdfIn PDF document text
    • https://hediyelikhanem.com/calisma2/files/uploads/12788323852.pdfIn PDF document text
    • https://manenshop.com/upload/files/10184719699.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/32587946021.pdfIn PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/fevireridowogag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=chrome+web+store+developer+accountPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/vuzitenevokod.pdfIn PDF document text

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