Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde7912ed1e72cb7…

MALICIOUS

PDF

82.7 KB Created: 2021-09-16 10:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ccfbdef05580e8d18e50f5cc83ba407f SHA-1: 4c0d5855d19abe2759e5c7fa4218484a54ffa03b SHA-256: fde7912ed1e72cb70d021a9184cd142603a198cbffb333d88048830464028e03
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded URLs, many pointing to PDF files on various domains, suggests a link farm designed to host malicious content or redirect users to phishing sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://euroquimicadistribucion.com/zabaleta/data/imagenes_contenidos/file/xezusitutuzupagobovel.pdf In PDF document text
    • http://zl369.net/userfiles/file/85438970975.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/73975870067.pdfIn PDF document text
    • https://nbcmedia.vn/ckfinder/userfiles/files/jifaxosimanodugixoxere.pdfIn PDF document text
    • http://imobiliariaimperio.com/files/files/dibekurujosexepogu.pdfIn PDF document text
    • http://ministerium.pt/files/gukod.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/1206273443613518cfc9bd8.pdfIn PDF document text
    • https://www.rosebankprimary.co.za/inc/ckfinder/userfiles/files/99166865497.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d3c06ab877---lukivezewugepebakitev.pdfIn PDF document text
    • http://associazionemillesogni.it/userfiles/files/naremexenugupifizujogetov.pdfIn PDF document text
    • http://onlinetalk.jp/app/webroot/img/fckfiles/file/78144870621.pdfIn PDF document text
    • http://lineshare.net/upload/files/20210902100819.pdfIn PDF document text
    • https://natatourism.com/userfiles/files/vemogadogivamadonasulibu.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/d8dfca59e68495a534e9e6a802c2d69e/51102835342.pdfIn PDF document text
    • http://medi-sen.com/files/files/66601756053.pdfIn PDF document text
    • https://funbugs.ie/userfiles/file/5760131506.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/67180982289.pdfIn PDF document text
    • http://12shio5.com/contents/files/mutoxetisiluj.pdfIn PDF document text
    • https://xn----7sbbg1ddpkdc.xn--j1amh/uploads/files/98981966977.pdfIn PDF document text
    • http://esprimagroup.com/userfiles/file/11788485926.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/63588328982.pdfIn PDF document text
    • https://ijpdua.com/contents/files/36513664453.pdfIn PDF document text
    • http://www.la-rocca.pl/app/webroot/files/files/76882631293.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=android+drawing+over+other+appsPDF 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_off0000dfd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E2 17276 bytes
SHA-256: 0532147da5dcedbaf10124afb9f695c7ec704d5273207c1f9d1a15abacf7dbd9
font_02_sfnt_off000124b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B5 10756 bytes
SHA-256: 013a0f2a757d0f99caafe1477022aa6ab72eff00c7d2641dc098cdf684163bdd

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