Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf0d2b763cfc4a32…

MALICIOUS

PDF

38.7 KB Created: 2021-04-01 11:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ecb55143acb9989cbfe42867b2e0f95a SHA-1: b4ffad2665f065ca9eba7d81a3d1af5ec074c874 SHA-256: bf0d2b763cfc4a32915803869cdb068a345ebc398908e0927aeef64aca29ed74
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by multiple heuristics, including ClamAV and an ML classifier, and exhibits characteristics of a phishing lure. It contains numerous external links, with a significant portion hosted on disposable domains, suggesting an attempt to redirect users to malicious websites. The PDF structure and embedded links indicate it's designed to exploit users through deceptive content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7309

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 38 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://seumenha.ru/award?keyword=demography+pdf+carter+center PDF link annotation
    • http://xuxodowenam.getenjoyment.net/xapudafazerebivipeveral.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388040/normal_6064ba665a69c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385415/normal_6007e94a57b18.pdfIn PDF document text
    • https://71347f20-8353-4153-bebc-dd2a28b3a5cf.filesusr.com/ugd/a382ee_2b774562aa6c41d8b40ec1a59c8575b8.pdf?index=trueIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_8d81436a709a4b33924e9165665bd784.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pogolo/gewuka.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/kasikivawuzani.pdfIn PDF document text
    • https://22449060-8e30-4723-8828-967625cce342.filesusr.com/ugd/eddc50_6c4a21c4f8ec4cc4a8654f78cafeff0e.pdf?index=trueIn PDF document text
    • http://teropisarazo.myartsonline.com/sufofuwalavesewori.pdfIn PDF document text
    • https://bf808793-8b46-4c54-8b11-319763181fa0.filesusr.com/ugd/0d018b_7bb8febe799c4c03b6bb938eec099d60.pdf?index=trueIn PDF document text
    • https://5a995288-ce6f-4ae3-a3e6-14272d8003db.filesusr.com/ugd/7be1cd_77d40cca59b148f3a4730a0c718d2f1e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/davawina/como_limpiar_sillon_de_tela_blanIn PDF document text