Malicious PDF — malware analysis report

Static analysis result for SHA-256 209b60f3ce7ca7d2…

MALICIOUS

PDF

31.4 KB Created: 2020-06-06 18:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b61dd95466e7e7618ee09214c4dd3502 SHA-1: 2f15989ce802a72b293c0c3ff62d388b23ddffd2 SHA-256: 209b60f3ce7ca7d2e8be56573dac59e5eaa6dd661e8021710e70dae787ae955a
92 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on different domains. The ML_NYX_PDF_MALICIOUS heuristic also flagged the file with high confidence. The embedded URLs suggest a link farm or SEO poisoning attack, aiming to redirect users to potentially malicious content. No scripts were extracted from this sample.

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://wangziyulekaihu.br3h.com/uploads/1/3/0/8/130874591/130874591.html#examen+de+espa%25C3%25B1ol+secundaria+inea
    • http://enchantingtherapies.com/uploads/1/3/0/3/130323594/gurigusifoje_fogalobovixabe_dokidavimus.pdf
    • http://thetransitioningvet.com/uploads/1/3/0/6/130605143/kefabavomuvab.pdf
    • http://tulsaheli.com/uploads/1/3/0/6/130603976/kanazoxa.pdf
    • http://74-123-72-15.mgwnet.com/uploads/1/3/0/6/130621351/bb6f4127ae2c.pdf
    • http://74-123-73-222.mgwnet.com/uploads/1/3/0/5/130538918/8126175.pdf
    • http://wakelandmanorinc.com/uploads/1/3/0/7/130775219/puwilaseboje_zupimise.pdf
    • http://terrilockwoodart.com/uploads/1/3/1/4/131453531/sakiwe.pdf
    • http://wangziyulekaihu.br3h.com/uploads/1/3/0/8/130874591/terms.html
    • http://wangziyulekaihu.br3h.com/uploads/1/3/0/8/130874591/dmca.html
    • http://wangziyulekaihu.br3h.com/uploads/1/3/0/8/130874591/policy.html
    • https://zivudez.files.wordpress.com/2020/06/watuvitarajapunomimek.pdf
    • https://sikorurapoj.files.wordpress.com/2020/06/60587478921.pdf
    • https://duwopizemole.files.wordpress.com/2020/06/rumesi.pdf
    • https://diloxer.files.wordpress.com/2020/06/50799657635.pdf
    • https://jarulese.files.wordpress.com/2020/06/tirezusaxavifu.pdf
    • https://segemabo.files.wordpress.com/2020/06/38294061980.pdf
    • https://joginadu.files.wordpress.com/2020/06/86587540354.pdf
    • https://saxapepe.files.wordpress.com/2020/06/zawetiku.pdf
    • https://tegedow.files.wordpress.com/2020/06/jopatiratozadod.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_off0000501c.bin
b93715382d4905af0bd7b5e75fca9461886622a4f438a9f5cfe5f5366fa643d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x501C 9788 bytes

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