Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1f35a8c97cbe3d…

MALICIOUS

PDF

30.0 KB Created: 2020-05-15 14:43:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03ce8e8e1de01ceec0541da2bab7eb65 SHA-1: 478f3f7d6f3aedee1fcec78b1a1b8b502243bda9 SHA-256: ba1f35a8c97cbe3dca869786396cb7e628f76145003aaa130e1aaedfdeb71a17
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also flagged this PDF as malicious with high confidence. The embedded document body text, though heavily obfuscated, contains URLs that are also present in the link farm, suggesting a coordinated effort to redirect users. The primary attack pattern appears to be a link farm designed to manipulate search engine results or direct users to potentially malicious content hosted on these numerous domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 3

  • 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.
  • 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://churchstrettontaxi.com/uploads/1/3/1/4/131407558/131407558.html#aeroplane+sarmad+qadeer+free
    • http://oliviophehandmadelvboutique.com/uploads/1/3/0/5/130588780/2248779.pdf
    • http://chileanassociation.net/uploads/1/3/0/4/130476885/9334215.pdf
    • http://mariosfamilypizza.com/uploads/1/3/1/4/131407588/metozisus.pdf
    • http://lionsgatedairy.com/uploads/1/3/1/8/131857734/7064761.pdf
    • http://changbinrice.com/uploads/1/3/1/4/131412491/joletumukate-ledep-gumekanupaz-detufizi.pdf
    • http://thecrazycatlady.org/uploads/1/3/0/6/130621030/4888959.pdf
    • http://kaijade.com/uploads/1/3/0/4/130491008/jedowixororater-jizefejefewot.pdf
    • http://tomboyoriginal.com/uploads/1/3/1/4/131454556/marobawum_xujavexufovu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049de.bin
104afe72fde08e1877ca85c1be147abf028701b09d71d462de7c7e993e6066c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49DE 9904 bytes

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