Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3b9602446b646f…

MALICIOUS

PDF

88.7 KB Created: 2021-07-16 23:06:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 5dbbb3b83209e0ea4046e2db68db836f SHA-1: 77739c99eb4db2f879fc2b7f628fc8a34946ce02 SHA-256: 0e3b9602446b646f8aa4795ab02f23512d9940d912229ac1301ba9ad1b2bc877
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2639

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 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c0895054d50---10937248349.pdf In PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/81262007475.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/giwul.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/4f05175e31cc41052d387f4d09c2c17d/93404471592.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/fafivumipefufisa.pdfIn PDF document text
    • http://www.prodomasa.com/ckfinder/userfiles/files/zuzoxinodowir.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844ee1b781b---14797890293.pdfIn PDF document text
    • http://linpus.com/app/webroot/userfiles/files/dezirabironudibafebu.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/pajilu.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/jum1i51om16dvs9jlkl9e0onga/17711751002.pdfIn PDF document text
    • http://mountcalvary76.com/clients/9/90/9062e1c9f2360b2cedac6e2854879500/File/68464239379.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/979ca07d259770951831eecfeaa7fb9f/25641062969.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7093bc7882---84403904068.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/ce9c818f22f2f3fd0030f74cbf253d45/18200891266.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/ug4bu941nb3a2ug3eeq7v6iaq1/29095089248.pdfIn PDF document text
    • https://coaching-jk-academic.com/ckfinder/userfiles/files/54717330091.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dabbff2bf1a---62593972607.pdfIn PDF document text
    • http://www.buildingmalawi.com/images/uploaded/documents/24896274764.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/tasuxokupemamojuxunutoso.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/84999379061.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2d70f2232---21655461430.pdfIn PDF document text
    • http://m4krichmond.org/clients/3/3b/3bf4c986be49c21931b3574e72fd8103/File/13908720269.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/1201644283b4bc769144542e4552e404/11408295700.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=lectins+and+healthPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10618 10204 bytes
SHA-256: 231d739b9c2f6fd45019b33d1b4d472212d8a81523fb8a79e7e8bfc5e478a008
font_01_sfnt_off00011cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CDD 17016 bytes
SHA-256: fa5583220fd3c31474531e6bd173692e8d9c684527bce2221ad3a67be471f0a2
font_02_sfnt_off000148ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1