Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d8ec29a182b5e7…

MALICIOUS

PDF

91.3 KB Created: 2021-07-14 07:43:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: f5dd944b483582abed5decf7d7e5c9a1 SHA-1: d965560be4cfb5e6aecb9155f26c761fd5067de2 SHA-256: 07d8ec29a182b5e763e0e833b36ce4f52fe2a488aff43df6da2a2d310b24dc5d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or malware distribution intent. While no scripts were explicitly extracted, the nature of the URLs and the PDF format itself often facilitates the execution of embedded JavaScript for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://inwebjor.ru/uplcv?utm_term=all+the+living+things+in+an+ecosystem+are+called PDF link annotation
    • http://noahsmarinesurveyors.ca/userfiles/file/82945677791.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095eebded591---dalezanufuso.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e7ea43082---fusemapixijewokubuterezat.pdfIn PDF document text
    • http://promador.pl/userfiles/file/vulojalero.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/vupel.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/48cfe0d994ab475c5ca1200709336fb3/xipiwulonujibizimateb.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd80b721d6---26039850452.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071a44a9e012---fitev.pdfIn PDF document text
    • http://msiutilities.biz/documents/19344820401.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b75283c49ed---kosumo.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c1b405989---makukavadimiz.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/c3a93c3adfab4e19543c66bd3e4d03f8/21876342243.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/89476354117.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/kesowabikivolotoxuzix.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/el8ml4ec75flecbniju1170n9k/79740499358.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6bc7bc2794---vogaje.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/42449268805.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/djjiqr059c0h26fonjd37v09iq/24814014998.pdfIn PDF document text
    • http://soflocops.org/clients/83264/File/vipawuru.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/990tvh2g5p2r00va7b16bhgg91/81649286566.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab19b8d8e4a---ninodusijosawazut.pdfIn PDF document text
    • https://sikanderajam.com/Robinson/ckfinder/userfiles/files/bepelezefepamepo.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/muraritizawojuveb.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d067452caef---66980532813.pdfIn PDF document text
    • http://sutinlawkrabi.com/ckfinder/userfiles/files/xubibujug.pdfIn PDF document text
    • 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_off00010024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10024 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11836 17648 bytes
SHA-256: 00603a23cac435aa6a0f01706af7f86ef5808439c8f0a311d0aca4db0aebb8c9
font_02_sfnt_off00014638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14638 10976 bytes
SHA-256: c83e7a25e67f27fb5b77d58d17d054a214c790b0f8b79704660d989c7154222d

Open this report in the interactive analyzer, or submit your own file for analysis.