Malicious PDF — malware analysis report

Static analysis result for SHA-256 d24b9f76826b9842…

MALICIOUS

PDF

43.8 KB Created: 2020-03-27 13:07:29 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7b3bd8f8c6531b0b2fb4118d5b9007e5 SHA-1: 1aaf824ad27da7377f76c709874aa0ae21faea3e SHA-256: d24b9f76826b9842a2128f41228651a3b465537dd652dde128833132ba749ffa
62 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. These links point to various domains, all structured similarly with numeric slugs and 'uploads' directories, suggesting a coordinated effort to create SEO-optimized content. The primary purpose appears to be redirecting users to these link farms, likely for malicious advertising or traffic generation schemes. No scripts were extracted, and the document body is heavily obfuscated.

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://franciselphick.com/uploads/1/3/0/2/130288562/130288562.html#que+es+un+controlador+en+informatica
    • http://bombingparadise.com/uploads/1/3/0/6/130621684/310dcd3884.pdf
    • http://edmundhayesinsurance.com/uploads/1/3/0/9/130968935/vusabele.pdf
    • http://livesmithlake.com/uploads/1/3/0/6/130605521/6516277.pdf
    • http://myagedcaresupport.com/uploads/1/3/0/6/130620747/7aeee53541bf.pdf
    • http://eatstown.com/uploads/1/3/0/2/130271114/11afb8a.pdf
    • http://swipeforwifi.com/uploads/1/3/0/9/130969648/901ba30712eb.pdf
    • http://www.dufosse.nl/uploads/1/3/0/7/130739060/luvad-jitag.pdf
    • http://productionfront.net/uploads/1/3/0/7/130738593/mijalew.pdf
    • http://vera88keys.com/uploads/1/3/0/4/130491757/lezagosimexoneti.pdf
    • http://westernregionsamplescourier.com/uploads/1/3/0/5/130588644/0bbb3e.pdf
    • http://superiorcryptocool.com/uploads/1/3/1/3/131379405/84ed2.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064e2.bin
86cfde946b9ca3da5c80456a6a17d3835f94eff27d6e09166a63b2c914e965c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E2 8324 bytes
font_01_sfnt_off00008331.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8331 2652 bytes
font_02_sfnt_off00008c98.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C98 16036 bytes

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