Malicious PDF — malware analysis report

Static analysis result for SHA-256 9de91dda465e0ef8…

MALICIOUS

PDF

58.0 KB Created: 2020-04-22 09:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b0d1b804819f904038494e6acc6e05a3 SHA-1: 1bd09c181db55b833231bc2f250be12218c1fce2 SHA-256: 9de91dda465e0ef8868f9df934c6fafd85bcac952175a821f46a02201bda5751
92 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, contains a URL that appears to be a lure related to 'Crash Bandicoot Nintendo Switch code'. The primary attack pattern involves directing users to a network of linked pages, likely for SEO spam or to host malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://almamaterofthenation.org/uploads/1/3/0/6/130604543/130604543.html#crash+bandicoot+nintendo+switch++code
    • http://aid-services.be/uploads/1/3/1/0/131070938/f23b47209f.pdf
    • http://dohabio.net/uploads/1/3/0/2/130273752/nevumageluduwiv.pdf
    • http://atlalasplace.com/uploads/1/3/1/4/131410662/bed4ccdb5c0.pdf
    • http://concengate.net/uploads/1/3/0/2/130272606/pidonuxonopewaliki.pdf
    • http://hvhauling.com/uploads/1/3/1/3/131398148/wonebamisix-temit-tesisilijepo-fozonup.pdf
    • http://palmistedor.org/uploads/1/3/0/8/130814286/2565801.pdf
    • http://tricitycreative.com/uploads/1/3/0/7/130739233/231cd34d.pdf
    • http://lemoorenaz.org/uploads/1/3/0/6/130621180/wizasevabopi_dorezo.pdf
    • http://tharillest.com/uploads/1/3/0/5/130588473/1b280c.pdf
    • http://tequila-fest.com/uploads/1/3/0/6/130621031/namugajuji.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_off0000bc32.bin
90c70bc9f6e7119fca83bcd72c1187aa640476cd6bb8f9a7b2fe996f38b52210		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC32 8220 bytes

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