Malicious PDF — malware analysis report

Static analysis result for SHA-256 507b240c724b45ac…

MALICIOUS

PDF

59.4 KB Created: 2021-09-15 18:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 94f7676d7b7e8277ca38e50b8335f811 SHA-1: 8b37df22aaf16f2042b186d8886e6ff98e67631f SHA-256: 507b240c724b45ac5f47b7ddc73419a1bd46a490c0af102885729f36f6a3611e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised WordPress installations or disposable domains. The embedded URLs, such as 'https://irlanc.ru/uplcv?utm_term=love+chat+mod+apk', suggest phishing or scam-related content. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8763

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://irlanc.ru/uplcv?utm_term=love+chat+mod+apk
    • https://artesapanaderia.xyz/aym_image/files/39678161429.pdf
    • https://viadagio.be/userfiles/file/91339588638.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/llngrfdau9vjmtr3qldk3m825d/tavod.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/b3cf152e3ba9510d4d15f7285c20d764/79789468902.pdf
    • https://chilegastronomia.cl/uploads/userfiles/files/viduliwofemu.pdf
    • http://okeefesreef.com/ckfinder/userfiles/files/75735880552.pdf
    • https://rybczewice.pl/userfiles/file/kodagi.pdf
    • http://ville-dammarie.com/ckfinder/userfiles/files/jawofelifi.pdf
    • http://bischofs-scheune.de/userfiles/file/narivoril.pdf
    • http://shinies.ru/img/lib/file/fubiguzovubuvumeke.pdf
    • https://brod-plovdiv.com/images/36946816199.pdf
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/27957459835.pdf
    • http://elementyzlaczne.pl/media/file/tolupinexemipovolu.pdf
    • http://christ-china.com/filespath/files/20210905105030.pdf
    • https://dbjadow.pl/attachments/file/86888328399.pdf
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/gukilizebazovevotute.pdf
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/ligivolofusudadiligulu.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe89084ef5---19927133945.pdf
    • https://maria-galland.ru/files/file/28369911862.pdf
    • https://greenlandpark.com/uploads/files/51554960846.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf9e0a9b9f---bimopamo.pdf
    • http://zwickerfoto.hu/_user/file/pusepisigumezuwamamixigub.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aafc47bb3f---nimefegepop.pdf
    • https://arbormaster.net/uploads/files/wolanuzeno.pdf

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