Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce1fc12babc49634…

MALICIOUS

PDF

51.5 KB Created: 2021-06-10 13:30:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c3bc2f7b5ec1520db322b9242905c5f0 SHA-1: c92bb312dad1d8bcdd67dd1ebfeef6356f399f82 SHA-256: ce1fc12babc4963431d85e69d1dcc9f4d09775233c540c7f7cbe87d6f145dc97
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates that the PDF is designed as a link farm on disposable hosting, likely to redirect users to malicious content or phishing sites. The ClamAV detection as Pdf.Phishing.Trojan further supports its malicious nature. No scripts were extracted from this sample, but the overall structure and URL patterns suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7011

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://laborke.ru/uplcv?utm_term=level+60+gathering+gear+ffxiv PDF link annotation
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608544e3af39e---75540854388.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/5652715277.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a639e3b4ef---40695187843.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/23913215ba71c40424747d9ff5b267a4/fisumodonudatabisunufo.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16077572a02ad6---xirulomopegipugusu.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/1459b83f27d95e8e0103e2dca2af2830/mukodivuxufapapufefaran.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/puvowu.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/a872690f6ef76bd78b0f6bb12aad0c38/kitusapafetaf.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/5sssqnncpt9bmtl38e2njdafsu/90404365212.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9bd938571---buvegixuruwewileju.pdfIn PDF document text
    • http://short-story.ru/upload/file/fujuminukuga.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a266ab35df1---wetefunugutamedopexapita.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/zazomolugumuwonukarag.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec16fa03e4---renipebiroxilaxu.pdfIn PDF document text

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