Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a1f326684adf1f0…

MALICIOUS

PDF

147.1 KB Created: 2021-06-29 19:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: cffe948979aa40364db7cbb01bf70425 SHA-1: cf0e5c7a322ecb736e35f07f2374449feb028120 SHA-256: 6a1f326684adf1f05537c20d2f1386edc5014ec8d7f244e75e384c0096972515
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file 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 compromised websites, many of which are hosted on disposable domains or utilize vulnerable CMS plugins. The primary goal appears to be to lure users into downloading further malicious content from these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8520

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://haps.company/wp-content/plugins/super-forms/uploads/php/files/46hgmu10g0d964984qvv6ghav7/79396632812.pdf In PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dde7bb5c7c---76371730376.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be6a9eab73c---2920659602.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/73058138990.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/f4551b8ee2ed0f965709c198d5b16693/xegasepavikasikor.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/jotalebapunobotof.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/jr9limprj9k30gf6bhkdldacj7/77079577374.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6534ca1cf---9036539861.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861fa9ae109---26244520836.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/4e25a8e5348821f4b23ba89e98e7df08/pozijopolisizamowofab.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/793a4a07a1564dd511c914873f5e4134/22985285726.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e5ae31eff---30369050679.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d865aa493---widujagodimaxetovo.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/cbd5be5bfad1c6bdcc798043ed10201b/pefogepodilusu.pdfIn PDF document text
    • https://free-spirit-city.eu/uploads/wysiwyg/files/tanajuge.pdfIn PDF document text
    • https://careersourceokaloosawalton.com/files/public/9720606196.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/f88436a23f517a3ebab58db50b2dd637/50396142590.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/vepq1jjd8b0t587h7op63bi05j/92812621620.pdfIn PDF document text
    • http://timnhanhonline.com/upload/files/besepufituxixatebadinolap.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc01d16efc---47418990456.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c84d5b5dd82---xokolepinubaleponul.pdfIn PDF document text
    • https://aspirans.com/files/file/51661012881.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/36210316553.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c72af908d1a---segatodeke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=winston+churchill+portrait+he+hatedPDF link annotation

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