Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2a7a21ecc8f61f…

MALICIOUS

PDF

81.8 KB Created: 2021-08-07 05:38:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e14224224c398b4b6af7a230b933e2d1 SHA-1: 34114a87f61a2342b06fd400d9fac1713a0a2b6c SHA-256: 1a2a7a21ecc8f61f1809fa3ef7b1d453a216c291432949d01e69084b8b700a2b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated maliciousness. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8116

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://crysiq.ru/uplcv?utm_term=emile+durkheim+anomie+theory+ppt PDF link annotation
    • http://machinegroup.ru/img/outer/files/57122572607.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a69fa1e289f---sexaganidumunebir.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/repiv.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b7a522e35---4570801303.pdfIn PDF document text
    • http://www.empresshasnoclothes.com/siteuploads/editorimg/file/48058871509.pdfIn PDF document text
    • http://phongthuydotho.vn/upload/files/kitimaxovuwib.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/jonozesobiwa.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/13075882986.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/gunipapedumafivesa.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/nuoeo2kd972eahfvks1oggqibv/popeseganefinuxuzowa.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/2In PDF document text

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