Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8ef705463501185…

MALICIOUS

PDF

44.0 KB Created: 2020-03-24 09:01:10 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b47c7bfafafa7182d66cb84a5ea6b7ff SHA-1: a192bc692b3bfc4e6b2f424cf5789e87a7e6b3bd SHA-256: a8ef70546350118537bf2d77bc24c1981ad951fb3f96c42c7253db047831c2dc
92 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, with a significant number of external URLs embedded within its structure. The primary heuristic indicates a mass external PDF link farm, suggesting the document's purpose is to direct users to numerous other sites. The ML classifier strongly supports the malicious nature of this PDF. While no scripts were extracted, the sheer volume of outbound links points to a coordinated effort to manipulate search engine results or distribute content from a network of compromised websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://harrisonrappaport.com/uploads/1/3/0/6/130604104/130604104.html#water+based+polyurethane+over+white+chalk+paint
    • http://practicalmanagementconsulting.com/uploads/1/3/0/3/130323811/gozadiwup.pdf
    • http://kcpurenaturals.com/uploads/1/3/0/3/130324047/tubezodabiwasab.pdf
    • http://christinetschida.com/uploads/1/3/0/7/130739147/7249950.pdf
    • http://tanahome.com/uploads/1/3/0/6/130604951/nodoxit.pdf
    • http://demo11.vistait.com/uploads/1/3/0/6/130620574/milakimibiwap.pdf
    • http://sheepsheads.com/uploads/1/3/0/6/130604933/3829328.pdf
    • http://taboo-tabu.org/uploads/1/3/0/5/130539516/625a3aecc66ec81.pdf
    • http://dripexperience.com/uploads/1/3/0/5/130588396/8ca1f11d8e6e61.pdf
    • http://smalldiningsets.net/uploads/1/3/0/9/130969298/044981309.pdf
    • http://mostlytech.com/uploads/1/3/0/6/130620455/5081401.pdf
    • http://74-123-79-186.mgwnet.com/uploads/1/3/0/6/130620356/784808.pdf
    • http://mytridentestates.com/uploads/1/3/0/4/130476976/996652.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_off0000837a.bin
a7feb42dce725fd0c93f49807e1f52f8d94ace7e7651e6e109cfb4640a7c76bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x837A 8140 bytes

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