Malicious PDF — malware analysis report

Static analysis result for SHA-256 a23d302c0d23ec56…

MALICIOUS

PDF

60.9 KB Created: 2021-08-09 02:25:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c36ea8bd1298a467ba907d24c4a0bdb0 SHA-1: d6d705bf801637fb053126fdc99b6e929fc2fd3c SHA-256: a23d302c0d23ec56f3950cdf8cad294ec6c6ad534cb68a24847e6ca018146608
154 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to numerous domains, many of which appear to be compromised CMS uploads or disposable hosting. These links are likely used to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9093

Heuristics 5

  • 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
  • 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://smidgel.ru/uplcv?utm_term=best+anatomy+app+android+free PDF link annotation
    • http://rudolphalexander.com/uploads/files/bebovegezivamoxuzipirek.pdfIn PDF document text
    • http://carrozzeriardue.it/userfiles/files/domavovevonuwerevudogo.pdfIn PDF document text
    • http://wintec-samu.hu/uploads/files/25819788418.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/35092451605.pdfIn PDF document text
    • https://familienbilstrup.dk/userfiles/file/94944013606.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/kc34f5jht8n3gl0v0u68as7gud/21194233481.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16073c7910148a---41851890342.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/b47ml5mkmao5tt86okui8a1o27/78278030296.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/fatezapo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a96b670aed---571300017.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/33690f5633438b09bc1dd14c85c5bb20/fusojefin.pdfIn PDF document text
    • http://spbmedax.ru/sites/default/files/uploads/jomedutiwudiwona.pdfIn PDF document text
    • http://gdaniec.com/upload/files/budosoga.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/2c49eeabc5fc58027ffa89723c8fa1af/62514919212.pdfIn PDF document text