Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b8e1fc41753ac64…

MALICIOUS

PDF

131.5 KB Created: 2020-04-07 21:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3f337eb471da6d0613a526f9b4afd4c0 SHA-1: e98485bf76ff5b61b3cced87225cc860b30ea293 SHA-256: 8b8e1fc41753ac641d9e0094ad89f2f833e541f8577945be30f34def257f0da6
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO manipulation tactic. The document body also contains a specific URL, 'http://stritemanagement.com/uploads/1/3/0/3/130313242/130313242.html#perry+and+potter+fundamentals+of+nursing+pdf', which is likely part of this scheme. The primary goal appears to be directing users to external resources, potentially for malicious purposes.

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://stritemanagement.com/uploads/1/3/0/3/130313242/130313242.html#perry+and+potter+fundamentals+of+nursing+pdf
    • http://naturesaromanaturals.net/uploads/1/3/0/2/130272493/nifed.pdf
    • http://instalacijejazbinsek.net/uploads/1/3/0/6/130639076/xewasutizunorir.pdf
    • http://josephbeggsfoundation.org/uploads/1/3/1/1/131164272/4857454.pdf
    • http://carnetmedicalduvoyageur.com/uploads/1/3/1/3/131379033/bipomovavuma.pdf
    • http://alumnifund.vc/uploads/1/3/0/6/130620678/nufawikak-lumefumujuvow.pdf
    • http://shuyuan.us/uploads/1/3/0/9/130969508/mowexaxojitiw.pdf
    • http://chdglobal.org/uploads/1/3/0/7/130776325/1325025.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c8bc.bin
8be27cdead2e2397971c6342d22d37a6a1d3dd3fdf27cad717399bc4968fb148		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8BC 9352 bytes
font_01_sfnt_off0001eb72.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1EB72 16036 bytes

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