Malicious PDF — malware analysis report

Static analysis result for SHA-256 edca1f79a1088c8f…

MALICIOUS

PDF

92.9 KB Created: 2021-09-03 04:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: fbdc842831e5207e15d743f00d1293a0 SHA-1: 80edf72efb52e721eb4b510cc3b2d11dd46a2b51 SHA-256: edca1f79a1088c8fe40270502e01acca2c2040aeef20cc5b09c39c3f482b9b2a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of links pointing to compromised WordPress sites, which in turn host further PDF documents. This behavior is indicative of a link farm used to distribute malicious content, likely as part of a phishing campaign. The ClamAV detection further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2640

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://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/jlik90orlsglkbkc9h04iefdvm/53164074670.pdf In PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/cn7mta3j7licenr4g1s6u4553p/34081204423.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d4f2ea0b2---15929170104.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161102c452790d---57373472156.pdfIn PDF document text
    • http://evola.it/userfiles/files/finamorilujojifegogapimug.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/7759abc4ebd4df176334557327d36678/43985912493.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/geregajemerolak.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/54679162653.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/bigodekurupisaxoluz.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16084939810a21---jigazaleg.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/6792309e5e4d94466a974e1397a0f006/84612004907.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160748e2675f80---15989816468.pdfIn PDF document text
    • http://vuoncotichdep.com/upload/files/dugun.pdfIn PDF document text
    • https://atkarisuli.hu/userfiles/file/renokaxofogu.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d19554bd6c---93549836938.pdfIn PDF document text
    • https://floridagreatescape.com/media/file/wovuregupinarik.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075de89bc693---32923454354.pdfIn PDF document text
    • http://medicamarsala.it/userfiles/files/33734915096.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f7e51fd29---xatozemi.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070298c74d13---57628150589.pdfIn PDF document text
    • http://siamsnail.com/media/userfiles/files/ruzenilanogos.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/dotametezo.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ae3ae9f8c---debakexevikuse.pdfIn PDF document text
    • http://georgewongdesign.com/gwd/upload/files/98221377919.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/178449509506f01b06c16bcd2e55ddcd/setikarepobaligero.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=bwv+1007+pdf+guitarPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119EF 20656 bytes
SHA-256: 55d72481037ca24a8c40a649bce950af54ba78335d551ade483fb8ee40857c06
font_01_sfnt_off00014fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FA2 10632 bytes
SHA-256: b67de0324c37370e1b6006071d304b4a76eed4ab83fb38ec20be0105da2aec6d