Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce5c8d391e6afde7…

MALICIOUS

PDF

59.6 KB Created: 2021-09-04 07:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 6140982c7335cefb90e4cd548575daae SHA-1: 37b78a0ccb0603867f3103eab9489798f31725f5 SHA-256: ce5c8d391e6afde76f3a7a5763baae1fd63331f3f601e04ed23e334f35eafcff
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. It contains numerous links pointing to various domains, many of which are hosted on compromised WordPress sites, suggesting a link farm or phishing lure. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate an attempt to direct users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3863

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://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/7kl6i8v1t3rmljah0j71f8adc4/mexewosoluno.pdf In PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f343d5f45---32480826607.pdfIn PDF document text
    • https://www.hmgfinance.com/ckfinder/userfiles/files/10557890188.pdfIn PDF document text
    • http://dlzhrjd.com/images/uploadfile/files/punapixekuram.pdfIn PDF document text
    • https://derechosenred.org/aym_image/files/kutigo.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a76cbd38b2---gofatosewofewelevutavufet.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e06f886fe95---vidukilawevelufobemoje.pdfIn PDF document text
    • https://hepiran.com/cache/fck_files/file/62816645454.pdfIn PDF document text
    • http://grandinspirations.com/clients/75274/File/48199515584.pdfIn PDF document text
    • http://ainut.fi/userfiles/file/71965956049.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/81204642630.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082adde2a945---vuvosolabikedopis.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/2e9e1dffbc74617b00c77bff67f8588c/dufawuvitewuvud.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943be74419c---bavifawikutoxakuwe.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/kabekefozorunizoporeg.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/26676553671.pdfIn PDF document text
    • http://shangrilayunnan.com/ckfinder/userfiles/files/20619204295.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca6f3ab769---kavimuja.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16097dea297ce1---ladibewimevexefi.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/21581274756.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/62249320037.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/2f940cec4b0c10e0f00991cd74f861cb/14357200697.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=titanic+flute+notes+pdfPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/61ad0f83443cedf6b36e45345d3a8e81/sadogubowo.pdfIn PDF document text

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