Malicious PDF — malware analysis report

Static analysis result for SHA-256 25b397bf3bf7ecec…

MALICIOUS

PDF

33.3 KB Created: 2020-05-30 23:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 715677e926e17e5a40a809e960298f5c SHA-1: fe164d3281140645b29c95e07361880704d08b1e SHA-256: 25b397bf3bf7ecec9247223101641fa634a8e3f9d648ea405af371b05d05710f
62 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links to various domains, identified by the PDF_SEO_LINK_FARM heuristic. These links likely serve to distribute further malicious content or to manipulate search engine rankings. The document body itself is largely obfuscated but contains some of the same URLs found in the heuristics, reinforcing the link farm nature of the file.

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://a1713251xstreamtravel.xsideas.com/uploads/1/3/0/5/130588856/130588856.html#corpusculo+de+barr+que+es
    • http://mscomunication.com/uploads/1/3/0/5/130590499/54f6cbaef11752.pdf
    • http://mail.valleyviewfarm.net/uploads/1/3/1/6/131636914/da93204e1993.pdf
    • http://jacr.site/uploads/1/3/0/6/130604045/wadaga.pdf
    • http://eze-fab.com/uploads/1/3/0/7/130739769/rolagaxumowujuge.pdf
    • http://lettersbylaurendunn.com/uploads/1/3/0/2/130287261/919995.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_off000052d6.bin
75dc65c2bf49f55ad9d331948131a19aa04933f3f7e9a6c80774ee2d783963c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52D6 12524 bytes

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