Malicious PDF — malware analysis report

Static analysis result for SHA-256 532290b907f35f9b…

MALICIOUS

PDF

74.8 KB Created: 2021-06-11 22:48:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 8a354aa4dac4914ec5a0ffd817290219 SHA-1: ec4fdfdacd8b35253b0748d80aa1871208a236ae SHA-256: 532290b907f35f9b937407640eefe5bbcd294e87904ab9c382f8daf3e511a486
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file, identified as malicious by ML classifiers and ClamAV, contains numerous embedded links pointing to external websites. These links are hosted on compromised CMS upload directories and appear to be part of a link farm, suggesting a phishing or malware distribution campaign. The document body's obfuscated content and the presence of external links indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8356

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://wastran.ru/uplcv?utm_term=template+cv+docx PDF link annotation
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/86kupqb79a95abcbu445vdn143/vonubufix.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/093560f0b13e3e796929a860c485d148/11272947818.pdfIn PDF document text
    • http://hasyo.net/files/file/9775253367.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/24972f8567dd6fce29ec48520d77fd96/17494388246.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-16/20210516084201971886.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16095d4c4367f0---22488567093.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/rgh4tdff0ho5moa9fk3lvtdf7n/68065714633.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/f8cae6160397d011478a09b3d410194a/wukebolukizavefonipi.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd21b0fc85---97667271790.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f75f3982c5---15086529231.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa12145dbf1---dukorisatunevenolalasew.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160743256c3220---xazorezofumekupavunaxoje.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087c47b7652b---kuburidokikapabaroguv.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b7dd1a763---46441335159.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fc764339b---46642690743.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d7514b688---30991526113.pdfIn PDF document text

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