Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e809aac6d68d81a…

MALICIOUS

PDF

70.7 KB Created: 2021-09-18 23:34:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2160bdb5de293d9f9322c4b8eee80126 SHA-1: 72c11a58ea1ff17a7cc0514bc28efce7653a1d08 SHA-256: 7e809aac6d68d81a55645dece1595aeeb1e36264c4a85b3cc77f330743a23b31
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malicious redirection scheme. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to lure users to malicious content, likely as a first stage of a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5802

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://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613445fccb621---60168186383.pdf In PDF document text
    • https://coevent.ru/upload/files/16406091940.pdfIn PDF document text
    • http://www.arborvitae.cz/ckfinder/userfiles/files/fazotige.pdfIn PDF document text
    • https://unitedfightalliance.com/ckfinder/userfiles/files/wuguzetu.pdfIn PDF document text
    • https://mauspro.net/upload/files/pevabixakurafubagiwupi.pdfIn PDF document text
    • https://nazrabilisim.com/calisma2/files/uploads/8903428320.pdfIn PDF document text
    • http://ichieh.tw/uploads/files/202109102252428746.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132455e1d849---xezidenabebunedogex.pdfIn PDF document text
    • http://furniture83.com/upload/files/rudetagujesejisadi.pdfIn PDF document text
    • http://zonwering-belgie.com/ckfinder/userfiles/files/36657193329.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/46797335163.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161384250697be---36564305594.pdfIn PDF document text
    • https://eagleegg5k.com/ckfinder/triplebuserfiles/file/gofenofirivupuduzujepuni.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133ebb435fe5---fanok.pdfIn PDF document text
    • http://cdmvt.cz/sites/default/files/36309239749.pdfIn PDF document text
    • http://pegasomeeting.medcoast.net/ckfinder/userfiles/files/pujuguwejunefezokuzabek.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/depugupulefime.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/65159721389.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b20b704722---mafamusuwevovidu.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///zedisuwol.pdfIn PDF document text
    • https://srsatta.com/ckfinder/userfiles/files/ladodamipi.pdfIn PDF document text
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/96023281365.pdfIn PDF document text
    • http://hyunsin.net/userfiles/file/perogixusife.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=clownfish+download+for+discordPDF link annotation

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