Malicious PDF — malware analysis report

Static analysis result for SHA-256 66cd524d629e4b7a…

MALICIOUS

PDF

104.9 KB Created: 2021-06-12 05:08:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: fe4c70e3197e22e2381b34175ccd2b36 SHA-1: 33edbe9279aea8e6d151d67bc207c2e0d324fda0 SHA-256: 66cd524d629e4b7ac80e58e144c59812e387aedc521e8662ca5428484aa48ba9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains references to a TV show title, likely used as a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9458

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://catamma.ru/uplcv?utm_term=marry+him+if+you+dare+episode+1+subtitle+indonesia PDF link annotation
    • http://paillasse.hu/userfiles/file/53657404800.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/gehvotns5sphgseuea69h4cabv/24466502020.pdfIn PDF document text
    • https://erdemlerkoleji.com/resimler/files/jizunodepikipisezitari.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072894190f40---37029528017.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a850b6bd5b5---48814312584.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/ud6gilvpcophdsh1o92n5k8tp0/47961219529.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b470e49ac7---95042512617.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6891d6d88---61001930886.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160777f460f38b---nifewapovatapolalofir.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084b096c05a3---likofomadazokokozageka.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/ibfiqinlp37p43oqvbfv1k3pp0/tajujetazuladogiteru.pdfIn PDF document text
    • http://paykaaluminiya.ru/ckfinder/userfiles/files/76046688501.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/leniwakajavewopekokamen.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4c0211557---54091091900.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/4b7o09q9e2cpjri3n99uc2gudh/wobipewavidipimen.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/40132478967.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/44119285141.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/74ffeb85253d052292e9e485c10f812c/72017108257.pdfIn PDF document text

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