Malicious PDF — malware analysis report

Static analysis result for SHA-256 079b4ee81bffef6c…

MALICIOUS

PDF

77.5 KB Created: 2021-06-10 12:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 30660cad7711b3c31f9c89dcd782ac19 SHA-1: 3aa1294a2a21a9a4e091618460de0e4fa0324420 SHA-256: 079b4ee81bffef6c38574a4bdd329188eac3cf92f9ff99b5da5c94a2ce4e556a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links to compromised WordPress sites, suggesting it is part of a phishing campaign or a link farm for malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of numerous external URLs and the overall structure point towards a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8646

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://crysiq.ru/uplcv?utm_term=manual+accounting+meaning PDF link annotation
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b056f32b17e---87508561403.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1b38be2fe---26535759637.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160883e9643451---wejemizunimikilezewu.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/a6c62db2359e6d0c90b9047164649a8b/xofebuxapesozanomem.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/888c499565ba73183b3ce35c76ddcf52/semugenatofuf.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/fexabenedizekijapev.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/50017256418.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/5d5a0557c847f02afd3559463b95419f/lopad.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/85432992129.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/31538408841.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0d40dfb20---2467492043.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160871319928d8---lowidaruvigabote.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/6752320142.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/xotene.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9adfd0dfc3---boparizamodugepek.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/51tk2a9p4gs07qt7s4um149no5/winexiwawan.pdfIn PDF document text

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