Malicious PDF — malware analysis report

Static analysis result for SHA-256 00be212cd40cd666…

MALICIOUS

PDF

74.6 KB Created: 2021-09-13 09:15:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5236fdcf107d72cba5803553c2f2d315 SHA-1: d3c9b3aa3d7e5a8f373539537317265c5b23397b SHA-256: 00be212cd40cd666a7eea177c193df616f564614fb96444699d418965a410fd2
134 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, many pointing to PDF files on various domains, suggests a link farm or redirection mechanism designed to lead users to malicious content. The 'SE_DOWNLOAD_BUTTON' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jingluo.net/uploadfiles/files/xaluxa.pdf In PDF document text
    • https://learnrkbin.jugalbandiresearch.com/ckfinder/userfiles/files/volakaxikikosekuper.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/88319650857.pdfIn PDF document text
    • http://duplisite.com/userfiles/file/98662999838.pdfIn PDF document text
    • https://majubesar.org/contents/files/8738268951.pdfIn PDF document text
    • https://somos.co/dleyes/admin/fotos/file/29471669772.pdfIn PDF document text
    • https://www.institutvzdelavani.cz/files/jamat.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/losuxofumefubotivevikuxiz.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/66217638000.pdfIn PDF document text
    • https://marblo.com/app/webroot/img/files/nufopasejuzamisigutekef.pdfIn PDF document text
    • http://pjteam.hu/uploads/fadobutakelak.pdfIn PDF document text
    • http://thienminhgroup.com/uploads/userfiles/file/34856517186.pdfIn PDF document text
    • http://balone.net/_upload/file///22049048190.pdfIn PDF document text
    • https://vietrocknet.org/app/webroot/img/files/54338382786.pdfIn PDF document text
    • http://grupafurman.pl/!mag2011/userfiles/file/defogafosivogepuxaga.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/ki14m8bgu0gmpuvamij66hivta/73291619688.pdfIn PDF document text
    • http://iehyun.com/editorupload/file/91932062432.pdfIn PDF document text
    • http://braghieriarchitettura.com/userfiles/files/31563057608.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/2423126822.pdfIn PDF document text
    • https://www.potravinyav21.cz/ckfinder/userfiles/files/50900000432.pdfIn PDF document text
    • http://faw-asia.com/image/upload/files/domafopadowaser.pdfIn PDF document text
    • http://zhatuogz.com/uploadfile/file/39381572668.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613365b872acd---gezewobe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=mumbai+saga+full+movie+free+downloadPDF 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_off0000beeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEEB 10984 bytes
SHA-256: 5fc9438096a30bcd85110ccba2dceaaaa61d4fa49993130feaabab90a269cb39
font_01_sfnt_off0000d83a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83A 17252 bytes
SHA-256: 188b51b7cd8758510284984ceb7e8b28e1454b3cacc616b7e73e0dbcff246b9e
font_02_sfnt_off0001050b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1