Malicious PDF — malware analysis report

Static analysis result for SHA-256 dacdac38312debd8…

MALICIOUS

PDF

58.0 KB Created: 2021-05-18 00:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3afa770f4f6e23de901008ddbdf2d4c SHA-1: 95223ddb73fa3a2897ef76052255b7a9796a850a SHA-256: dacdac38312debd8cea218cb378287efcf1e070e5117f7baed57b066e73b1d2b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with one prominent link pointing to a suspicious domain 'midufefew.ru'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to create a link farm or distribute malicious content. The ML classifier and ClamAV detection further support the malicious nature of the file, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8425

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/strik?utm_term=gregory+mankiw+principles+of+economics+8th+edition
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    • http://detixaluziweki.22web.org/missin_you_crazy_acoustic.pdf
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    • https://static.s123-cdn-static.com/uploads/4420776/normal_5fecfff75660d.pdf
    • https://static.s123-cdn-static.com/uploads/4449406/normal_60063fb9dba2e.pdf
    • https://lerasakob.weebly.com/uploads/1/3/2/6/132682990/semegirejodolote.pdf
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