Malicious PDF — malware analysis report

Static analysis result for SHA-256 19dcc0092defb855…

MALICIOUS

PDF

43.9 KB Created: 2020-04-22 03:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 05274a9143acf2ea92d67a29e159138e SHA-1: a345c12febf6c38a5b1aa50fd452c220bab79246 SHA-256: 19dcc0092defb85520be93fad7ba8ee3b0f7dd51046c67e784a6ee16417daf0e
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous external links to various domains, many of which are structured as SEO link farms. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains text related to 'Income spreadsheet uk', suggesting a lure. The presence of multiple PDF links and an embedded URI points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://coffee4change.net/uploads/1/3/0/6/130604476/130604476.html#income+spreadsheet+uk
    • http://stitchedkouture.com/uploads/1/3/1/3/131383664/sewazavidufijo.pdf
    • http://wodkan-poznan.pl/uploads/1/3/1/4/131407148/e974bf8d436.pdf
    • http://improvehertomorrow.org/uploads/1/3/0/6/130620705/xokaxiwufawifanere.pdf
    • http://canariasmicasa.com/uploads/1/3/1/4/131407918/defusewozos-suwezarogejewa-gulobokibiv.pdf
    • http://tribelocbyshena.com/uploads/1/3/1/4/131437444/nigezojojaj.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_off0000846f.bin
0dc341363425ea80c44874a2915a713b94f7966ff362ab5498d4c7eec7a19013		 pdf-font-stream PDF embedded font (sfnt) at offset 0x846F 8344 bytes

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