Malicious PDF — malware analysis report

Static analysis result for SHA-256 46eb8179980db326…

MALICIOUS

PDF

78.1 KB Created: 2021-06-16 06:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: fb9ce9f0b93564c4482ea3f43fbab48e SHA-1: eb94adbff2b455cbeea2df8a99cd79c0cec5160c SHA-256: 46eb8179980db3264c7745384eba75b9534523b9c03df93286f3b90be74966d8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains a large number of embedded links pointing to various domains, many of which appear to be compromised WordPress sites used for hosting PDF files. The document body contains garbled text and metadata related to its creation, but the primary malicious activity is inferred from the extensive link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9565

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=best+gear+to+fight+ender+dragon PDF link annotation
    • https://roweryelectra.pl/app/webroot/uploads/file/1623181434846.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160948b16343c7---vumovawidunejojipepu.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/a780af7dd5cec88c88e460b211f3c951/busoniruguwuti.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/2ebdd0304fa67da1d8db40b96283010f/sokosupozixinevuxixu.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/4tie81t86l7s50mplc0v31jq0t/noxodirefajov.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/3b32k6kgq69d4mqjcn125um4qu/gaxefunabelivo.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/nevupasutilix.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/aejb3v2dnfebja3mlrcopajed1/rozanatupimozavop.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210509011649.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c5f14bfa8---nerusedafaku.pdfIn PDF document text
    • http://msiutilities.biz/documents/gevobamufuz.pdfIn PDF document text
    • https://kaptenhoki.com/contents//files/56914977107.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1dec65fde6---88851542509.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/535d4f55e493c29c58b1ed49a7403016/tutowafufedemuli.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/6f9d7cdac327d590a8b17b73e1ab2920/52501207219.pdfIn PDF document text
    • http://clinical-pain.com/pds/userfiles/files/73082906440.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B20 4972 bytes
SHA-256: 7d07f3f00b5c7870ccef27ad0f57f1554603fdd03e9b5be228738d868b036969

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