Malicious PDF — malware analysis report

Static analysis result for SHA-256 83ecbf28cf70f292…

MALICIOUS

PDF

57.2 KB Created: 2020-11-13 00:30:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f8976f8fffff797cfc4299b6e88d144c SHA-1: 67d9d1d7d8c9f96aa132334e67d83e2a519842b3 SHA-256: 83ecbf28cf70f292f28722aeb139d4827acbc2b701b374afbcf0594a963a7858
64 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8067

Heuristics 3

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://trafffi.ru/strik?utm_term=download+css+from+website PDF link annotation
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/tisimaxof-duromaji-kazawiloda-vaxugusegamare.pdfIn PDF document text
    • https://kexinebig.weebly.com/uploads/1/3/4/3/134338338/1162238.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417040/normal_5f96b56b9115b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423772/normal_5f999fd9549cd.pdfIn PDF document text
    • https://waxojokizubow.weebly.com/uploads/1/3/4/4/134482073/dimatodiponajaw.pdfIn PDF document text
    • https://minizaderi.weebly.com/uploads/1/3/4/3/134344024/mizizel_junun.pdfIn PDF document text
    • https://dafuzimobolu.weebly.com/uploads/1/3/4/4/134498283/bowotigu.pdfIn PDF document text
    • https://gekitudijelal.weebly.com/uploads/1/3/4/2/134265938/kogamogo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/fuvodotinotaxiwipuj.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/free_download_surat_yasin_dan_tahlil.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/xupogebofonegafazarepot.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/81212875480.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/ivanka_trump_books.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/woxuginaxunul.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC538 5400 bytes
SHA-256: 23e641f1b7faaaa4f31ba09e8cc5604d5314f8d01111f28280b6d5f3b6207d09

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