Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7197ef29cb4fd55…

MALICIOUS

PDF

82.5 KB Created: 2021-09-12 17:34:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: dfd84ccc49e894884c4dc3538b81bb05 SHA-1: 7c7bd8a76e40a4446d5242daf95244f090c126ec SHA-256: f7197ef29cb4fd55a3fd3d9b48888ec4da452d17a5dac9f16f9f28a79ab70358
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, indicating a link farm designed to distribute malicious content or conduct phishing. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • 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.
  • 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://nomylo.ru/uplcv?utm_term=new+indian+movies+2017 PDF link annotation
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/35379313326.pdfIn PDF document text
    • http://britishcytology.org.uk/ckfinder/userfiles/files/zilexakevabaleseri.pdfIn PDF document text
    • http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xiboraguzipipise.pdfIn PDF document text
    • https://rolcsi-bau.hu/userfiles/files/visalobifu.pdfIn PDF document text
    • http://imhkayseri.com/resimler/files/13972376376.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613d948b5ff42---tutorubivudogulisiwixepa.pdfIn PDF document text
    • http://werkschoenenverkoop.nl/images/docman/files/86558470168.pdfIn PDF document text
    • https://kalashad.com/userfiles/file/600390561.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/161324eee13789---kokifojiditemakilirolug.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/16444582963.pdfIn PDF document text
    • http://sanalights.com/admin/admin/uploadfiles/file/wiwugezodeki.pdfIn PDF document text
    • http://lidaoxc.com/upload/files/32841269865.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/felejuwitoxonuno.pdfIn PDF document text
    • http://centromp.it/userfiles/files/83445335032.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/46580061693.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/papum.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/vazaxovifukajuboxam.pdfIn PDF document text
    • https://quimicasorocolor.com.ve/ckfinder/userfiles/files/26383906021.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/dudegogizewi.pdfIn PDF document text
    • http://dorinhawear.com/admin/fckeditor/editor/filemanager/connectors/php/fckeditor/editor/filemanager/connectors/php/userfiles/file/41943397966.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210909170416.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/11900220859.pdfIn PDF document text
    • http://greenbrier101.com/userimages/33076315731.pdfIn PDF document text
    • http://istihdamhaberleri.com/upload/ckfinder/files/davenulasa.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF574 10636 bytes
SHA-256: fc5d4c6059702b80dc20521ee3f773104c1a4480029e42d65b71f74bcc9fef54
font_02_sfnt_off00010df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF5 17948 bytes
SHA-256: 93929fc31ca3ccd2059694879810c6cdf43fef71252d9c89d6f81b86763fbff5

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