Malicious PDF — malware analysis report

Static analysis result for SHA-256 7579839c65ec1dc7…

MALICIOUS

PDF

44.3 KB Created: 2021-09-21 00:38:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1029005fdbc6e94ea5accda55db9c157 SHA-1: ab64b36c795b4aaa3c3d114426f6990e21c44741 SHA-256: 7579839c65ec1dc7c80288bb545614ba0066b206510a323dfa851637081f4ac6
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as a phishing trojan by ClamAV. It contains numerous embedded URLs, many of which point to PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, further supporting a malicious intent to direct users to potentially harmful content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4178

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 http://annassteen.com/ckfinder/userfiles/files/38376123462.pdf In PDF document text
    • http://visoda.lt/ckfinder/userfiles/files/30721490917.pdfIn PDF document text
    • http://alacartedesign.de/userfiles/file/21619856338.pdfIn PDF document text
    • https://agmatbaa.com/upload/files/7205995422.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148c0a03e78d---xewumijakefifabisajon.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/67734812407.pdfIn PDF document text
    • http://re-media.ru/foto/ck/files/53852000247.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/mewexelosevevoruwagaxije.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=dead+target+mod+apk+latest+versionPDF link annotation

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