Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c0610658c21462a…

MALICIOUS

PDF

78.1 KB Created: 2021-09-16 21:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3188628daa8728d3251d392d3203cc2c SHA-1: bf2bf721e3a477f09d8089805707feaabe4f8247 SHA-256: 8c0610658c21462a5d4f7c299629d4392a2af3e7384c8e3f930042a6623cfb94
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. It contains a large number of embedded URLs pointing to various domains, suggesting a link farm or phishing campaign. The presence of external URIs and the 'link farm' heuristic strongly indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://pistant.ru/uplcv?utm_term=how+to+find+speed+in+kinetic+energy PDF link annotation
    • https://mauspro.net/upload/files/xudoruwijikoj.pdfIn PDF document text
    • http://giaydantuongphongngudep.com/images/news/file/nulidolopel.pdfIn PDF document text
    • https://cezartravel.hu/userfiles/file/mababubiregas.pdfIn PDF document text
    • http://ngoinvest.com/uploads/ckfinder/files/33961695794.pdfIn PDF document text
    • http://luxe-pools.fr/i/File/wuvimizile.pdfIn PDF document text
    • http://qwerty.pl/_data/file/sibegonoguwusevufexuzolu.pdfIn PDF document text
    • http://www.css-jp.com/upfile/files/2021/09/02/57507425966.pdfIn PDF document text
    • https://lesura.net/userfiles/file/wakapufevetemasina.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/zuxinaxogajapozan.pdfIn PDF document text
    • https://canoe.ro/Extras/ckfinder/userfiles/files/50993049462.pdfIn PDF document text
    • http://4bzsoftware.com/Images_upload/files/nadiluvotuzukumigesef.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/22124393794.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613363ed337e5---susoguwobu.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/nevanowi.pdfIn PDF document text
    • http://vip-cond.ru/userfiles/file/zoxege.pdfIn PDF document text
    • http://phunphu.com/userfiles/file/96936869691.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/pogafevologosalifiriwawi.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/mc81vcpr1q15po87c0k9rssgbk/vugirewoxolomisik.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/50207863218.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/90717401598.pdfIn PDF document text
    • http://sunway.me/uploads/file/140553135390.pdfIn PDF document text
    • http://av72-reklama.ru/userfiles/file/1631424862956996aa49093954075.pdfIn PDF document text
    • http://wdnederland.nl/file/62404395447.pdfIn PDF document text
    • http://sklenicky-obchod.cz/web/admin/fckeditor/userfiles/file/55923362651.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_off0000cc04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC04 17516 bytes
SHA-256: 51e730f6389e697aa7d04d1d79c3cc7907b23eb2487c4d403a6bc002ab37f442
font_01_sfnt_off0000f9af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AF 10872 bytes
SHA-256: 206e2688b0c0309f0d1c10d8fd3ff453ebe1f7abb15d87b8ca98eaa44e6b0d51
font_02_sfnt_off000112c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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