Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac36ac1abf86e658…

MALICIOUS

PDF

43.0 KB Created: 2020-03-25 07:45:37 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 952e5b0af72feae2ee3c686ba74b6422 SHA-1: 18f331d19d1b3e89066c183b224fdf0e97c06629 SHA-256: ac36ac1abf86e65812154727e3085d425f0c24c2643cb57cd82fbf5d50d4cd00
62 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or a distribution mechanism for further malicious content. The primary lure appears to be related to mathematical equations, as seen in the document body and URL fragments. No scripts were extracted from this sample.

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://addycakescookies.com/uploads/1/3/1/3/131380627/131380627.html#ecuacion+de+la+recta+tangente+horizontal
    • http://underbuy.us/uploads/1/3/1/0/131070231/puxinumotojud.pdf
    • http://tribalethics.org/uploads/1/3/0/8/130874329/dosed.pdf
    • http://chavezchallenge.com/uploads/1/3/0/4/130476130/jadimejoja.pdf
    • http://hostmaster.wildorigins.com.au/uploads/1/3/0/5/130550929/bezipogilativerokelo.pdf
    • http://www.atx360.net/uploads/1/3/0/6/130639235/2d681.pdf
    • http://www.360etherapeutics.com/uploads/1/3/0/6/130640102/nazexiroga.pdf
    • http://facialplasticsurgery.news/uploads/1/3/0/6/130604626/d84f6ea.pdf
    • http://jcrgraphics.com/uploads/1/3/0/6/130640019/1799132.pdf
    • http://casinographics.com/uploads/1/3/0/4/130436204/1397650.pdf
    • http://autodiscover.scholarshipsforscholarsofmontebello.org/uploads/1/3/0/6/130620237/6728337.pdf
    • http://heathermckenziemusic.com/uploads/1/3/1/1/131163590/mudegimiposakuseposa.pdf
    • http://breannavinsonphotography.com/uploads/1/3/1/1/131163991/4d77fdf8eed846.pdf
    • http://triplenewsworld.com/uploads/1/3/0/7/130776407/4118258.pdf
    • http://mta-sts.plainfieldgirlscouts.org/uploads/1/3/0/2/130287243/56f4270c4a.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_off00007c8d.bin
bc651bbf69368b5a8036670cd13f77fe20582f02deaad42b8fa52c263e60e4d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8D 9532 bytes

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