Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd205b21c6b7ae86…

MALICIOUS

PDF

66.4 KB Created: 2021-09-07 20:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 57c79a1cc9175a43ad0617503215cc23 SHA-1: 8763576c97acf3d7ace20e09a13001c4a81a0cb9 SHA-256: cd205b21c6b7ae862b8aae87fa16142bfd5154c922e14a35dfbf09783cd1e948
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable domains, suggesting a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' and ML classifier further support malicious intent. The primary goal appears to be directing users to download a secondary malicious PDF payload from one of the provided URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6093

Heuristics 6

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=mppsc+notification+2020+pdf PDF link annotation
    • http://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/buwofuz.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/ie021o9u6c61cdbfq3c1cpjrj5/50065520556.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-07-27/images/files/24099070680.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/54024848726.pdfIn PDF document text
    • http://myphamlulanjina.com/upload/files/2466847086.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/xutenadakogi.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e332862698b---18878847439.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0721a3afa---27350432399.pdfIn PDF document text
    • http://rld-carbon.ru/file/sawojaripiserewaxopo.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/1d586434f425e5251f052ec082670aa5/18396465385.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da6c172954---gizevuwowalawaduki.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/b88758c80b7e11e968b527b4bb70878f/nafujeja.pdfIn PDF document text
    • http://jump360.co/upload/files/20210626014841.pdfIn PDF document text
    • http://envigest.cz/upload/file/kakurebokixutave.pdfIn PDF document text
    • http://bulongvungtau.com/media/ftp/file/zukivofimaxitagis.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/aa299c049aabbaaec2d9317b773bbe7f/vorukem.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1609496bce7fb4---90877761895.pdfIn PDF document text
    • http://vaughanreunion.com/clients/7/7c/7cfe0b8ff6d5e3136a6575a9b258a09c/File/fepogupijekegaxaduwelivon.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e2f6d7ccbebb25619576e7f509139ef7/vejojugiposamerufop.pdfIn PDF document text
    • http://eva.am/files/3efe09c017c80771.pdfIn PDF document text
    • https://imaggu.com/ci/userfiles/files/lotedif.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e13d4c764---7855598376.pdfIn PDF document text
    • http://uni-farm.pl/ckfinder/userfiles/files/23197063015.pdfIn PDF document text

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