Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c6fea9d8da6760a…

MALICIOUS

PDF

89.2 KB Created: 2021-08-06 23:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a8d2581d6ed4910cecc88e404b3f1259 SHA-1: f4567d0e5bfc9424edd4e94b3632d8ec2bfb1bb7 SHA-256: 7c6fea9d8da6760a1b1ce3ebd7b4819e94e87a1d05ca036ec7a49f7e9ff1fe05
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a link farm pointing to numerous URLs, many of which are hosted on compromised websites or disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of numerous external links and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggest the document's primary purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://progin.swiss/ckfinder/userfiles/files/paguwemituragezifad.pdf In PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/b4kgs8aqjp68j2fkehl74fe6iv/20000239275.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/c5aed4a84ff4e074a4ca30e443ad5c2d/dapivizujuzopepudesukake.pdfIn PDF document text
    • http://tvtamminhphat.com/uploads/userfiles/file/88952479921.pdfIn PDF document text
    • http://mdknoodles.co/uploads/files/zipiziralawajitav.pdfIn PDF document text
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/71662532180.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/vskjp8h2eb15h043a8ltsjn56g/fazulojakiganito.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea4c97dc1c---vorarojujazavavesesolap.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf797fb419b---novuvirane.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/dfca0ff7b9ba6ef2c61782b46398953f/wuronuwelajaruzijuvon.pdfIn PDF document text
    • https://primer-spb.ru/files/files/rusapotofeva.pdfIn PDF document text
    • http://kalmi.ru/upfiles/files/fewekulimumonok.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/5ab2821f23735dc0bbf2a0b62198adc0/genurepilifaxonu.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/nuvojubotumujogi.pdfIn PDF document text
    • https://www.aukuras.org/ckfinder/userfiles/files/lidedigetepego.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160d5ec3764970---jopivuxik.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161051e75c11fe---wukowipusajegaboxenisadox.pdfIn PDF document text
    • http://summithigh75.com/clients/867147/File/bodik.pdfIn PDF document text
    • http://sacmacbook.net/userfiles/file/puvevomupaxagogogo.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b2379d7ffaa---37355862328.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/lumalese.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c6af0375488---binilobopikora.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/tetisopaviniteg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=singer+stylist+543+manual+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_off0000f740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF740 11348 bytes
SHA-256: a16a899465b55a00f1279f3723cfb5d391eda6b2afc0141de28aeb5dfe7f5a0b
font_01_sfnt_off000111dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DD 17440 bytes
SHA-256: 3e31529adf0bef524bd14ff630a9e54c1a74ae942b06f86aa28e62ef885bca2d
font_02_sfnt_off00013eb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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