Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ecf1adc404ebdbb…

MALICIOUS

PDF

78.9 KB Created: 2021-09-02 08:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5ee6455bf7d2c71bff06964ff4c2f6b9 SHA-1: ff99891226958e1d9edf59164d6fa7077de6c5b0 SHA-256: 0ecf1adc404ebdbbf9c858eeb80cb18e6583812f0730cb94bdc38ae53e334640
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious link farm designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8273

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://huntic.ru/uplcv?utm_term=entertain+in+tagalog PDF link annotation
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/v9l1c4sjc5k84rq2461p9fe3q0/fipowubudedinade.pdfIn PDF document text
    • http://laiksmodalux.lt/app/webroot/uploads/userfiles/files/58877759184.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/3a240c93903b7ab958ef5848a2669fad/fetogo.pdfIn PDF document text
    • http://jumpinfit.it/userfiles/files/33555284418.pdfIn PDF document text
    • http://kozelskadm.ru/files/uploads/files/zixidugiliganakefifusu.pdfIn PDF document text
    • http://costruzionibulagna.it/userfiles/files/98374406750.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b8fefbc12ff---16547305119.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/52767169311.pdfIn PDF document text
    • https://gelblighting.com/userfiles/files/26720818153.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/cc74d56f06e894f33fd064a21cee21bb/xobobosizovalepiduwele.pdfIn PDF document text
    • https://kaptenhoki.net/contents//files/95001062426.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/sarivakidimawif.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d3fd546de4a---segeboraj.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/77270431665.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/sokivisivexumumemubapa.pdfIn PDF document text
    • http://mentaplywood.com/images_upload/files/97647314035.pdfIn PDF document text
    • http://kisito.com/userfiles/file/sunufutezefaberiwopalomim.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/jexev.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/pogivujiweber.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a52181ea405---waletu.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/bmv3ob59rfqmjkri19gqdduiq3/25540588848.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/zudedopuzeveloxopelibope.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/lonuzuwuxativonemixezone.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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