Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e5f6530724039d…

MALICIOUS

PDF

79.5 KB Created: 2021-08-16 08:14:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 89e38c72aa793ff222840ca2c06fe2b6 SHA-1: c43e409d3c8b4579363661efe68fbd6404d29280 SHA-256: e6e5f6530724039d6db6ecb7d2f452ca3f14cfa964337c6c956852043accd42a
156 Risk Score

Malware Insights

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

The PDF file contains a link farm directing users to multiple external URLs, some hosted on compromised CMS platforms and disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://noihoithanhtuan.com/media/ftp/file/34845059025.pdf In PDF document text
    • http://herve-coiffure.ci/files/15386212360.pdfIn PDF document text
    • http://trevelsi.ru/ckfinder/userfiles/files/48768279350.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/73063424571.pdfIn PDF document text
    • https://ventadeterrenosurbanos.com/userfiles/file/pasupuxenosubufosow.pdfIn PDF document text
    • https://quatden.vn/webroot/img/files/divigogawujewot.pdfIn PDF document text
    • http://gawhs80.com/clients/873705/File/7303689697.pdfIn PDF document text
    • https://thedestinbeachhouses.com/wp-content/plugins/super-forms/uploads/php/files/58aa9febc0532f8824085e87a65cd5d4/rapodavakifogopikib.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f43ba5030---1878075249.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160782f7367f0b---jugodezinigowawafomuwija.pdfIn PDF document text
    • http://www.drivingschool-brno.cz/files/files/zopozokeposon.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/nazinitemagerejonexifi.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc14d24c08---26993054029.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078a7a96de12---nitegole.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/jewevasarusina.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/fovurorekifuka.pdfIn PDF document text
    • http://tdbakademi.org/userfiles/files/dojibileb.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/82d4c46314ca345e0bc6e985fa773cb5/rigidowedogutere.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607976a25c8b1---48330751109.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c86970c14d1---wimotegoleg.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1de3f5db90---71791833833.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840a23b69b5---kanedixufanavibitekeleb.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/bd4cf29931e3726d3b79cc7193399c6b/22568646210.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/fd9d98657455ef93062dfc86aedb13e5/75125598889.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=right+2+know+chattanoogaPDF 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_off0000d43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43E 10408 bytes
SHA-256: ed026a8b1dbfe27b2675ea0359b04e1e7dccc89e74f85d98f1edfccf7732fb28
font_01_sfnt_off0000ebea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEA 16852 bytes
SHA-256: c9e955dd7d7eac29fdf12832e90f0b16710196d0b36649a617e8f6b22a128e7a
font_02_sfnt_off000117f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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