Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c23c03ca6e9fdfc…

MALICIOUS

PDF

99.7 KB Created: 2021-09-06 10:36:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 6f0199b0b7e024b4be6c535745bed90c SHA-1: e61bd214f352beeb31c792083dc07078ed338af0 SHA-256: 6c23c03ca6e9fdfc886e2f04300585658f7696e8847b4d17451409a0684e99fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 malicious score 0.9870

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/dmc0ppif4rts8fka7bjhd9iae5/kewatuzawu.pdf In PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/rejesovisak.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16125cbab418ab---93958254049.pdfIn PDF document text
    • http://purofirstli.net/userfiles/file/17051281646.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/1623294098100.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8eece3405---37768312673.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/lubiwix.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/d563dd7ea0772f0b86f83d579b0976b3/majugutofavopemewadinefi.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/tatubam.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607dee4e591f3---39629334329.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/23763182338.pdfIn PDF document text
    • http://lagerunda.it/public/upload/file/pilojinorimikenijemilej.pdfIn PDF document text
    • http://jucal.es/images/file/88033863601.pdfIn PDF document text
    • http://www.teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/nemap.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/13076400603.pdfIn PDF document text
    • https://unosms.us/userfiles/file/13798713498.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607585c4a4cb7---ponusexametori.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071d43dee53d---57661721369.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0d5986317---fumus.pdfIn PDF document text
    • https://senesi-sklad.cz/userfiles/file/82082526313.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/0n9gsabcqvbp7mst1e8ql7oubr/liratosomoda.pdfIn PDF document text
    • https://mygenius.ru/admin/ckfinder/userfiles/files/91787936782.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/45031295241.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091be7aa767e---40303395743.pdfIn PDF document text
    • https://milliondollardesiclub.com/upload_files/featured/files/migilijugitemakoge.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=applied+chemistry+engineering+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E3 10880 bytes
SHA-256: f797ec12573556ec2f836103a1dfbb31386ad912071b8981c9ebb3dfcc57fabb
font_01_sfnt_off00010fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA0 1820 bytes
SHA-256: ef4c56b83544acc0eae329b123dcb13384a4443b8ee25b6b011fcec9f25c534c
font_02_sfnt_off00011826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11826 21796 bytes
SHA-256: 4bf79248c6b0bf11653ecc81432381e2802c65b0b02651d05f566b1ff947d196
font_03_sfnt_off00015137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15137 16320 bytes
SHA-256: a61d684141661bd7e25227023c6ce57728fecc34f676d4b5e6e450b31f799185
font_04_sfnt_off00016786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16786 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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