Malicious PDF — malware analysis report

Static analysis result for SHA-256 a445b958850d5bb5…

MALICIOUS

PDF

37.5 KB Created: 2020-04-09 09:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 50d8cb8c06e3839ef5a54102566c4bb8 SHA-1: 3d8b27328c21d44954e34845c8aa0da8ce85c667 SHA-256: a445b958850d5bb5c007bc6eed0946b7a6b4c7dcae17f38d14046aa9a4591874
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, many of which point to similarly structured URLs on different domains. This behavior is indicative of a link farm or SEO spam campaign, designed to drive traffic to various sites. The document body, though partially obfuscated, contains text related to 'Historia clinica psicologica completa word', suggesting a lure to disguise the malicious intent. No scripts were extracted, limiting the analysis of direct payload delivery.

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://alisimglass.com/uploads/1/3/0/6/130621485/130621485.html#historia+clinica+psicologica+completa+word
    • http://bingemate.net/uploads/1/3/0/7/130739002/sufovowepefodi_mexuxan.pdf
    • http://dynamicbuildersutah.com/uploads/1/3/0/5/130544591/fowafurisalox-rabotal.pdf
    • http://wholelivingfarm.com/uploads/1/3/0/5/130540725/pamuposanus.pdf
    • http://ballyrealestateventures.com/uploads/1/3/0/5/130588473/3499111.pdf
    • http://menoftheimmaculata.com/uploads/1/3/0/3/130313494/78b5e.pdf
    • http://brionybalmer.com/uploads/1/3/0/6/130621004/revulu.pdf
    • http://hammcrafted.com/uploads/1/3/0/6/130639453/3573237.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_off000066e2.bin
38817a92846b797872fa6244d02a47a45e08d7cfb4a63f06f715fc2801cab5ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66E2 9228 bytes

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