Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebdc999d9792bb78…

MALICIOUS

PDF

81.1 KB Created: 2021-09-07 12:01:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 223393e2bc2993fec01dc7e06a2dafe9 SHA-1: 062a67ab17173bbd69e74a8db6a2b80390e8c070 SHA-256: ebdc999d9792bb78b4fdd43e55c3f5da9630237e48f6c6124466850ec2051627
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to host phishing content. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically related to phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://catamma.ru/uplcv?utm_term=command+to+center+worksheet+horizontally+and+vertically+in+excel PDF link annotation
    • http://centreforeffectivecoaching.com/media/file/56080115483.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160c92a9c1bfdc---letuwajarudigenerej.pdfIn PDF document text
    • https://iuoshili.com/upload/users/files/77283127469.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094bc67dfebe---xudopofimakegofa.pdfIn PDF document text
    • https://nslogisticservice.com/userfiles/files/27829457861.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/tsh74vv2rvvga67re8fe9fg6df/1213473365.pdfIn PDF document text
    • https://kawanmto.com/contents//files/50117946575.pdfIn PDF document text
    • https://ibrahimkoc.com/images/Media/files/fumitetakitavuxob.pdfIn PDF document text
    • https://m-isc.com/userfiles/file/75343650952.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16091caefdef96---61641981431.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e95f4447c5---dogemapajufodejipuvub.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096edd2615e9---85047013657.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/18611287517.pdfIn PDF document text
    • http://xatrbio.com/userfiles/file/jujipaviru.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/kle95at3cmoin8bmlts9ktgl95/1275522352.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/14403366866.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/5cec6dec93d21f77a9744e2af141dfe2/71867808818.pdfIn PDF document text
    • http://fkhd.cz/data/img/nimufub.pdfIn PDF document text
    • http://agroanaliz.by/upload/editor/files/22997170367.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6483497f82---81701232040.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebd28f130a---24754735760.pdfIn PDF document text
    • http://vako.vn/app/webroot/uploads/files/8398337109.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e08e419cb---sufor.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A5 11188 bytes
SHA-256: 1420f155cbaf52431b920f24ba6e62e2585d300e14d72e38ff25d86db273b10f
font_01_sfnt_off0000f1c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D8 17232 bytes
SHA-256: 7601c2ce387333360e81d41f943ce3203d70cd87232428f1aff78d0532002772

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