Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0aa2a906158f82…

MALICIOUS

PDF

49.5 KB Created: 2020-11-24 21:21:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c33e32bcb95e53cb97cef3013389356 SHA-1: fdf6e8e3f67faf87fcdbfe73645461735784f8ab SHA-256: 1c0aa2a906158f82f7ed90f9abb723ac33ba8d7c0d00cc0888a27f2d48e3873e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various domains including 'traffset.ru' and 'weebly.com'. This suggests an attempt to redirect users to potentially malicious content or phishing sites. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the presence of embedded URLs and the link farm structure indicate a likely distribution or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6448

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://traffset.ru/strik?utm_term=lower+moreland+high+school
    • https://cdn-cms.f-static.net/uploads/4478148/normal_5fb34af31a47d.pdf
    • https://cdn-cms.f-static.net/uploads/4372360/normal_5f8b61d723e23.pdf
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/kopiwu_gotatumeturi_bovejixegas_vivikow.pdf
    • https://cdn-cms.f-static.net/uploads/4369307/normal_5f892125b55c3.pdf
    • https://cdn-cms.f-static.net/uploads/4493917/normal_5fb96a4e4b8c3.pdf
    • https://cdn-cms.f-static.net/uploads/4447253/normal_5fa33436a140c.pdf
    • https://mixodozom.weebly.com/uploads/1/3/4/3/134333910/e213fe3.pdf
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f8980b38a851.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dusined/bang_bang_full_movie_1080p.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b912.bin
7533fb06abb4fc43d5bc23671dde0ac3856ce91a98c3501f085f57b56a400396		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB912 5092 bytes

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