Malicious PDF — malware analysis report

Static analysis result for SHA-256 61ea5957b3d75556…

MALICIOUS

PDF

82.4 KB Created: 2021-09-01 22:52:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: da3f689030e041a1432959e3adca2e9e SHA-1: 68864338a633a8dbb76b39ecd72f58a01650a841 SHA-256: 61ea5957b3d75556e02bef1649361498cc3934f11bb395d5e761b14dbc75e1aa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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
  • 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 http://rafaelokazakov.com/file/58288109311.pdf In PDF document text
    • https://kildevangen.dk/files/39593229484.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/tudomatiko.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3e1f8c53f---16395174352.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/18754726541.pdfIn PDF document text
    • http://avtokit116.ru/!upload/files/larugopukunifuwebopilugof.pdfIn PDF document text
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/3oqet01ahvlcmfe353e3faepcu/58486399615.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b07823ae9---wunowodi.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/91741523227.pdfIn PDF document text
    • https://karatenarrewarren.com.au/ckfinder/userfiles/files/28086173656.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/617a3d0e06d16138cb7107af3bad2d89/kewijitulewofinaba.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/faf987efaa7f2c87e34ef8376bf578e8/sejexelafefapabuderetes.pdfIn PDF document text
    • http://myslizdrave.com/soubory/nazekivajadilubip.pdfIn PDF document text
    • https://umartravel.com/files/55873689293.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a74f3b72669---55474574717.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/43613476012.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec07fafd5f---mewiropukigeno.pdfIn PDF document text
    • http://zjpjxt.cn/upload/uploadfile/file/11628650535.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/13794984765.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/nelabegerapubozunixa.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/66de5bc892f32a571a39c7dd66cfeaf7/26972180995.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/1bb393053ab7f41332f58bc8a80a97c4/51429494563.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=iron+spider+man+drawing+easyPDF 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_off0000ddbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D3 10744 bytes
SHA-256: 6dda81f03732598a20d78721a78d39cb1c22a0893a4307f60e38f33855b86259
font_02_sfnt_off00010e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E50 17432 bytes
SHA-256: 34016da890af7cc3712950de95c4339d8a8d7030d43eec640105f345207ca19c

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