Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ffca3c8326584de…

MALICIOUS

PDF

60.1 KB Created: 2021-06-14 00:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0404fae95f4e303b81316ddcc0cd22e6 SHA-1: fc17b617338c715f77167ae919cbddc5efca10df SHA-256: 7ffca3c8326584dea5d1a84a72df6de0fd80672af4fd3908fcd8b79cdcc770cd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to redirect users to malicious content. The presence of external URIs and the overall structure strongly suggest an attempt to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7146

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://synerhu.ru/uplcv?utm_term=super+encounter+telugu+movie+2021
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/99d2a9c7e151f8625b21b8d5567eede6/36716077700.pdf
    • https://glycocalyx.nl/userfiles/image/file/69588724956.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//24340169377.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b402f29f54f---dunijuvijiwuwal.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5575e73c6---vofikugelufa.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16086f88580a8e---75047657884.pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d66920d866---5240005607.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad8fac6469---junoduvebosimodabiz.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160749b80b199d---kojuzeraputisur.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/sasfkmgg991ogpnoqq1oce1ld7/vuwokesomitan.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608611340659b---butujipuzunimiduzoli.pdf
    • http://wamer.org/userfiles/file/judebivalakipewuzirotak.pdf
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/75315736648.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608433a39b650---togisali.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1310a82e5---mopexer.pdf
    • http://hublihorse.com/uploads/userfiles/files/8474277410.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097dba8d448e---rarivobas.pdf
    • http://alnadaoil.com/userfiles/file/jekusegotate.pdf

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