Malicious PDF — malware analysis report

Static analysis result for SHA-256 143fd5249248a22c…

MALICIOUS

PDF

57.0 KB Created: 2021-05-30 11:18:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 967af41c78f81605fdc56a60d9fca63b SHA-1: cfdd07f3d67f8683688866f3c3c8523d3632c7b2 SHA-256: 143fd5249248a22c1d1c1aaf2f87e4d8be797160beefcb62e8b3611143ee52ae
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm used for phishing or malware distribution. The presence of a URL with 'shell shockers unblocked games 76' in the query parameter indicates a lure to attract users interested in games, likely to redirect them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8808

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nomylo.ru/uplcv?utm_term=shell+shockers+unblocked+games+76 PDF link annotation
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7457cb399.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/856a7af9098ffd9f0d60cc2cb7dde443/rawikosonagodorudugen.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9839ad382f428259f492a533ffbbcd94/80820480001.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a4551ab6d2e---7321909545.pdfIn PDF document text
    • http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/uilmh9tv6u2rm58l3m5cefq54l/47260856787.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b37f642b05---bodilubumodamozokatarajor.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ec7ed018ab76546691f103794065aa27/44926999511.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/b9c6fb9e59619f7f8502753fc363fafd/bigobuxogigogilud.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/bqqasq592mp5kqi66gffc06rq6/gebedusowa.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086da91b64ac---39459615889.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/73b5a76854d63b6d0b45b8fb38f1d931/jewulotisojujak.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/fopizojajowavezin.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/196vp82sgeft54qiahjadpo5r6/25088001572.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607206adb2404---46939527309.pdfIn PDF document text

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