Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba09d83deecaa094…

MALICIOUS

PDF

31.7 KB Created: 2020-06-03 07:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba6488426ba4c7d6b52b4d89783dae2a SHA-1: 1d571561d787388eb2fddb8aa5a3c86ef3a1fb67 SHA-256: ba09d83deecaa0941bcef5c4e3b4f58fa1b233c9b39a5587c6726708913a5423
92 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious. It contains a significant number of external links, many of which point to domains that appear to be part of a link farm. The document body, though heavily obfuscated, contains references to these URLs, suggesting a deliberate attempt to direct users to potentially harmful external content. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://host29.carmichaelnl.com/uploads/1/3/1/8/131856146/131856146.html#brugesstar+by+pause
    • http://uto.paris/uploads/1/3/0/3/130323139/sikuzijawexepowimuw.pdf
    • http://glamthrash.blog/uploads/1/3/0/3/130379675/68a955f5ca46.pdf
    • http://monicalass.com/uploads/1/3/0/4/130483783/gisuworu_demigutajejet_demazokolafag.pdf
    • http://host29.carmichaelnl.com/uploads/1/3/1/8/131856146/terms.html
    • http://host29.carmichaelnl.com/uploads/1/3/1/8/131856146/dmca.html
    • http://host29.carmichaelnl.com/uploads/1/3/1/8/131856146/policy.html
    • https://rofatekarem.files.wordpress.com/2020/05/duxotapit.pdf
    • https://zopowozofoje.files.wordpress.com/2020/05/vawowafebunisudarowuzus.pdf
    • https://vemupuki.files.wordpress.com/2020/05/57246092629.pdf
    • https://bujamabak.files.wordpress.com/2020/05/fexurexapaw.pdf
    • https://roxidowarabo.files.wordpress.com/2020/06/44963135815.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_off00004fd3.bin
8abb783c2b01a8c8468fbc0b6aae69054e74782c458ed9681fd0eaf20c5c7040		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FD3 10320 bytes

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