Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec5a7a48540c83d2…

MALICIOUS

PDF

52.5 KB Created: 2021-10-05 00:03:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3ff534505c7a62046d163f0a1e5d2a30 SHA-1: e21a544a0f851a2da6af76c4bef4714b2be9b286 SHA-256: ec5a7a48540c83d21074f2efebd9265b9c57fea81c48e22d97f5c3a2d5f88c41
154 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Numerous heuristics indicate the document functions as a link farm, with many external URIs pointing to various domains, some of which appear to be compromised WordPress installations or disposable hosting. The primary purpose seems to be directing users to external sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8679

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://wastran.ru/uplcv?utm_term=green+horned+caterpillar+life+cycle PDF link annotation
    • http://sloplast.com/userfiles/files/gedos.pdfIn PDF document text
    • http://leton.pl/userfiles/file/88938284891.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615b6bfc85f4f---kufemexuxiseborure.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/84170772645.pdfIn PDF document text
    • http://nextgenship.net/upload/file/2021100416333659619.pdfIn PDF document text
    • http://bratislava.topenglish.sk/app/webroot/gallery/files/tibijipe.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/38795544896.pdfIn PDF document text
    • https://prospr.fr/ckfinder/userfiles/files/96736989990.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/p6nlnnmknnm400en1g09c1j4tj/lopiboxakefinedaxuduxawe.pdfIn PDF document text
    • http://jjteriyaki.iorderfoods.com/uploads/files/54404373008.pdfIn PDF document text
    • http://photou.cc/ckfinder/userfiles/files/80096139793.pdfIn PDF document text
    • http://baocaosudanang24h.com/uploads/image/files/guwigonidosigajof.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f515821d51---35145921487.pdfIn PDF document text
    • http://doradcyprawni.com/images/pliki/756353372.pdfIn PDF document text
    • http://vikingpaint.com/user_file/file/jojumonabowo.pdfIn PDF document text
    • https://efckrakow.pl/userfiles/file/37705764111.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/tofokinofovimakusevoxuga.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/161319132c0d80---81431996971.pdfIn PDF document text
    • https://firsathosting.com/calisma2/files/uploads/61407426727.pdfIn PDF document text
    • http://detskypohar.cz/upload/file/jawivigowam.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/mexexanoved.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/h7fjrqhc4gjf4dpfk7c0os1gn0/5792499610.pdfIn PDF document text
    • http://standdominica.org/files/files/xixapo.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d77bf296cf---26714279944.pdfIn PDF document text

Open this report in the interactive analyzer, or submit your own file for analysis.