Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca69dc8ed2d74bc1…

MALICIOUS

PDF

72.7 KB Created: 2021-08-22 06:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 82efb52874d8229ee55a9f587b241a91 SHA-1: a5d7cb9d7147dc8a0cea770ce6c751bf7f0f223f SHA-256: ca69dc8ed2d74bc15d1710974301ead5a7de829a212e15d6e1d66ff42550a030
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites. These links likely serve as lures for phishing or to distribute further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/17f330b2a57a0a1d34047f5c90c3ffe0/nebemufonesil.pdf In PDF document text
    • http://auxerretv.com/content/public/file/dimivizivefifufujo.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160826f9f6be6d---zadupimojobusogarojokip.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/7ad80186c54db5e9cb86472d1e766128/nilenak.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/63635333147.pdfIn PDF document text
    • https://kund-in.com/userfiles/file/62396648321.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/7ee62997a7cf869453478a7d87e1324c/95137610797.pdfIn PDF document text
    • http://cec-intl.ru/app/webroot/files/file/62509591844.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/tepubomef.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/46715387817.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c572691a27---lizezezazefofi.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/rumalotegixosurowevi.pdfIn PDF document text
    • https://sinhadventure.com/uploads/file/17555050023.pdfIn PDF document text
    • http://onmamtour.com/FileData/ckfinder/files/20210703_A4EA1C31375EEFA8.pdfIn PDF document text
    • http://huichem.com/ckfinder/userfiles/files/kotoxojawof.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109d96b8e930---zarujomanud.pdfIn PDF document text
    • http://wallsfamilyreunion.com/clients/876683/File/ranafotos.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/39079385874.pdfIn PDF document text
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/lujawag.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607202d579880---kewosute.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b477ef332bd---ravilanonoj.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/84267677482In PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=ramazan+yetgin+tarih+notlar%C4%B1+ygsPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB754 17888 bytes
SHA-256: 38c458f000f8aa6d9642627f820feeecd81a158deb36817d72c597044b88f650
font_01_sfnt_off0000e2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F8 10820 bytes
SHA-256: 599a813840ad22bed8c9f036772f44e91835fc7f4fe3d7336cc40f3253117077
font_02_sfnt_off0000fbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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