Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ea5029f476380c…

MALICIOUS

PDF

91.8 KB Created: 2021-09-01 21:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4276f3f37312fcdf9e8ba72117ea6ded SHA-1: 2ba315a7767b17307c97ea1a98138b6aec607f79 SHA-256: 02ea5029f476380c7c9faa26ce2838991ae8eec3f6ebfccc25d2119ee8f7044c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The file contains numerous links pointing to compromised WordPress sites and other domains, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The presence of these links indicates an attempt to redirect the user to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/0gau8m4c193od8nduqcdkbr8b0/jifux.pdf In PDF document text
    • http://koreaseowon.com/ckupload/files/64806891989.pdfIn PDF document text
    • http://ruresept.ru/files/file/gamuwafimodupipusuw.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d074045b7cd---30189869015.pdfIn PDF document text
    • https://ski-valloire.com/ckfinder/userfiles/files/kapunojakarotuboku.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/161033e900fa6b---84715127213.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/41096ff759bbfdd58f3d37914e24ba33/sabozavufufudanaduza.pdfIn PDF document text
    • http://islaminkiel.de/webmisr/uploadwebmisr/file/69260290813.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/xawegaxuvevelaweluw.pdfIn PDF document text
    • http://sport-way.ru/img/file/92066122000.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/jofuxosavadebebamerij.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/f4927d63834cb1f9950ad53366d123bb/xawimumivazezerej.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/67087284361.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/nv18u7h1e937g5kt0fdib8th61/9529889818.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/0ca031314be539c3bf6f6a38ae89c6e4/11444640978.pdfIn PDF document text
    • https://tavio.ru/files/file/95871198567.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073ce016cfed---75789462495.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/tupefexogem.pdfIn PDF document text
    • http://immopolignano.lu/images/28015470466.pdfIn PDF document text
    • https://ruxthai.com/ckfinder/userfiles/files/99315847905.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/jerugozutivexuxofufex.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/7v4aua68f8mnanl7laaibd24o1/85834954946.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/zekedowuromemikivet.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/v0kk7on275dtd9qpcqr06p53rc/gijoget.pdfIn PDF document text
    • http://loadcell.vn/Images_upload/files/18191851407.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=types+of+advertisement+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001021c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021C 10756 bytes
SHA-256: 644decbe8aa5a6bb4ee706cf5a5909ddd93f954c5cebc049002393425d8e9a04
font_01_sfnt_off00011ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000132f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F9 17916 bytes
SHA-256: 84472ec4db5b52151ff7ae4683a71bd758b1e52fecfe7ac7873b5deb4b8f29ed

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