Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d9dabf9b57e4438…

MALICIOUS

PDF

66.5 KB Created: 2021-08-02 20:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f3d9d6b952378451ea1bb04d7d472a00 SHA-1: aede7cc328d8c9dfdcc88e7be654652348a1c96e SHA-256: 7d9dabf9b57e4438efe88ce6c9cf1399b969299fe29ac98414c155b4fc9ff92a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs that point to compromised WordPress uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm indicators strongly implies an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9770

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://chcial.ru/uplcv?utm_term=how+to+improve+the+sound+quality+of+my+android+phone PDF link annotation
    • https://alnahamgroup.com/userfiles/file/rewizukoxasizixonezegikor.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/bdd8960384aee690e637fdf6b8c42898/fuzozibi.pdfIn PDF document text
    • http://rheumatology.instituteupload/content/file/vajipigasekuvepotixo.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/41207918799.pdfIn PDF document text
    • http://xingyeknitting.com/userfiles/files/6651423055.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/jupesilof.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/78769798220.pdfIn PDF document text
    • http://chongros.com/userData/board/file/96700079179.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/lijetu.pdfIn PDF document text
    • http://raisemoneyonline.org/clients/6/69/691275cf9a36cab982b2498ebdc715be/File/14600017466.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/161039956a2a86---936957165.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/nivb93fofie3dvm1qra0gh6hk1/rupode.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/nn6vsankfuopbg3nl9p942q400/24165888056.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/71709372817.pdfIn PDF document text
    • http://iwaandccareunion.com/clients/57137/File/20558925758.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9ec692278---88116725948.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16099f39a10ffe---20924609008.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/e0c6c77191b6d037d829d12eebb9242b/1915779622.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a82ab36f08c---nixunebetup.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607359a8ce38a---81160101067.pdfIn PDF document text
    • https://heuresromantiques.com/upload/files/28445894092.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/0a0966a58c2165d74ecff1c903bdb893/javejosixedisenolofexaju.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16081816f2b29d---82466580488.pdfIn PDF document text
    • https://xn--faade-mtal-p6a3a.ch/ckfinder/userfiles/files/55475970113.pdfIn PDF document text

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