Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8b874e2d529e785…

MALICIOUS

PDF

41.4 KB Created: 2020-03-26 02:32:32 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 900f91bdca5b83880a6e92ad3e3c194e SHA-1: b5b0c35eef39beb0396a495e7565b743f13812e2 SHA-256: b8b874e2d529e78571a8da560577e8e8c8eab6e9bea94758893c134f26e22d89
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains a large number of embedded URLs pointing to external PDF files across various domains. This technique is often used for SEO poisoning or to distribute malware. The document body, though partially corrupted, contains references to 'Denver ii test form' and the authoring application 'wkhtmltopdf', suggesting a lure document. The primary attack pattern involves redirecting users to a link farm of potentially malicious PDFs.

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://radiancemallorca.net/uploads/1/3/1/3/131379268/131379268.html#denver+ii+test+form
    • http://apluspharm.net/uploads/1/3/0/3/130379104/sedokonolaniba.pdf
    • http://foxvillefarm.com/uploads/1/3/0/4/130488584/bijemixeno-jexalased-vudijofowitoze-fekogupagono.pdf
    • http://thislillightofmine.com/uploads/1/3/0/6/130621142/senimojixofajupinu.pdf
    • http://fearlessfenix.com/uploads/1/3/0/8/130813866/befesejofikoxojusiw.pdf
    • http://bimbus.com/uploads/1/3/0/8/130874018/wirijomoxuw.pdf
    • http://lancevictormoore.net/uploads/1/3/0/7/130739714/wapofinu.pdf
    • http://detourister.com/uploads/1/3/0/7/130776661/loxesomubimidemado.pdf
    • http://discountglam.com/uploads/1/3/0/6/130603851/7979349.pdf
    • http://pcbyrd.com/uploads/1/3/0/6/130640057/gexufogafi_pogoditogu.pdf
    • http://mybrookfield.org/uploads/1/3/0/3/130312925/7496614.pdf
    • http://thepourspout.com/uploads/1/3/0/3/130379070/vapodebelok-kozefiko-nuvifofo-wenis.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_off0000786f.bin
e6b849e46f2f417d509db829a994ed8cecb9f51578ea96bee76e5453e2921bf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x786F 8596 bytes

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