Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee4877e1f60cf2c…

MALICIOUS

PDF

54.7 KB Created: 2021-05-09 17:33:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0b815e2de220183d87b72bd16364539 SHA-1: ab8dd5a41082464bad31876218a3ac4267e82d99 SHA-256: fee4877e1f60cf2c3433e94e99269b30d2ea844f7a25cd012aaba21972199015
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous URLs and the PDF structure strongly suggest the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6945

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://infrive.ru/uplcv?utm_term=corporate+christmas+email+template
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/i1p4jph8dnda3a23grkonns8se/40694269823.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712fb9d66b0---30850461910.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160916ffc2f482---15554665625.pdf
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/08rc5pgsvnc3kg9ni4g6bsr7r4/fenejulajozep.pdf
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/f6cd0660efad0f7deca4340ba6548a27/79286884428.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/3mneoab3slltm9dercgu159t40/87652709133.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608622d2e3528---xizanuruzufozagitipa.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073fb9acc379---lituvizikowe.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9ad68fe0d---49310257111.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608aed19b3c42---nefusaxezifefid.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/72ab980iv1gl4su3l37aq63bmj/mesaxuzafigavilube.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/4km78noofijfq0pbmpil57cpe0/denugamuzunodot.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079283a976c0---zisev.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082777a51094---dewinotugusisutu.pdf

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