Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8df0069d7e7ffca…

MALICIOUS

PDF

49.0 KB Created: 2021-08-16 09:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: b48c783430a099d4a17549cd36674990 SHA-1: c969a60c7f813a123902aa931c2711b595724831 SHA-256: d8df0069d7e7ffcaa40d4c769ae010b1d334e9bfb4872a387c39e4e0577f21c9
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, with multiple embedded URLs pointing to compromised or disposable hosting. These links likely lead to further malicious content or phishing pages, aiming to trick users into divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4717

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 http://ruilong-ironwork.com/CKEdit/upload/files/16764743463.pdf In PDF document text
    • http://mppscstudy.com/admin/usercontent/file/81476167885.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086d3ea14ee0---18295371369.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca973c05d7---38974162642.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/fonixoxebirotemiduwuvi.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/18765730257.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9bbp04cipd74u3rssbc6lq4he4/62191042244.pdfIn PDF document text
    • http://mcap.cz/images/uploadedimages/file/5262114821.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=quran+in+english+text+pdf+free+downloadPDF link annotation

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