Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b10470023758440…

MALICIOUS

PDF

42.0 KB Created: 2021-06-20 02:31:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8d5a026ed954fe619de61f6d2385af8f SHA-1: d74bcbd5fafc60b35fa0541f2777dd53d365c15d SHA-256: 7b104700237584409ab665a18ed4ca61e06eab0d0bcdc567a972246e27defb38
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF is identified as malicious by ClamAV and a machine learning classifier, exhibiting characteristics of a phishing lure. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to exploit users through deceptive content and external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7871

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 42 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d56c85edb---piwosi.pdf In PDF document text
    • http://wedding-ideas.ru/ckfinder/userfiles/files/welusiro.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/kimikewogugugekuw.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b140f184119---23963629883.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/rixumetisewedazadirozalid.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b08d727e5a9---80559937318.pdfIn PDF document text
    • http://vangphugia.com/userfiles/file/3844378995.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/14d81e4fa27f7839f12fce074df9efb3/nupetijuwaganaxokeziv.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be621c1cdae---71909995459.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/6h818ab8bdmocgtqeolht3a58o/xiguxukowefa.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/3246f5b83e8a2e0a45355236529b624a/55753382991.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/b4cbafebb205beff4eaeb10015c4a2ed/gitaxopuj.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba15fe35b84---bezatevemerotujav.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/539dba23c906ba1e89149db87982f6c8/29917930935.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/0bd2549216601fffc4164e9e05528248/57483158261.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9bc0dcf9d---25401390398.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609db1a695cfb---bavikusoxikonetomowoviw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=conversion+table+km+to+mPDF link annotation

Related samples 8

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