Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dc6ff52033ec85f…

MALICIOUS

PDF

84.1 KB Created: 2021-09-14 13:22:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 85925712d566ff802d876025be893737 SHA-1: be04450cb5d7514fbeebadb544ed75c4cc6a5872 SHA-256: 2dc6ff52033ec85fb39be129b3bf0082fb4b1c73587684f8f05bb66c6366eae4
196 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, with heuristics indicating it's a browser extension installation lure. The document contains numerous links to external sites, some hosted on compromised CMS platforms, suggesting a phishing or malware distribution attempt. While no scripts were directly extracted, the nature of the lure and the embedded links point towards an attempt to trick the user into executing further malicious code or visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://amrapalispot.com/userfiles/file/15715871256.pdf In PDF document text
    • https://stoneappeal.in/FCKeditor/file/poforiwuguresaduwidipoj.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/83533853213.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1bb948629---32874315727.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/duvuro.pdfIn PDF document text
    • https://nomortiga.com/contents/files/xamevevigo.pdfIn PDF document text
    • http://sreema.org/FCKeditor/file/19589510695.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/22ae862cf39b4789d41ccf5ddd221cbe/6437582774.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/13574911273.pdfIn PDF document text
    • http://zekejozsef.eu/FCKfeltoltott/file/lusitidagukisamux.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/valevixatod.pdfIn PDF document text
    • https://eirai.org/editor/ckfinder/userfiles/files/xefiwufodekuf.pdfIn PDF document text
    • https://digireg.si/upload/92963290457.pdfIn PDF document text
    • https://drisraadentalcenter.com/userfiles/file/85743014365.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/lnuoc9rsko33ap3utaldgjv5ea/modexemorirulebamimoz.pdfIn PDF document text
    • http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/62329964107.pdfIn PDF document text
    • http://capital96.com/userfiles/file/nulatefofapute.pdfIn PDF document text
    • http://mylivediamondinventory.com/uploads/files/66594339375.pdfIn PDF document text
    • http://eminenceinc.com/userfiles/file/68959326767.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/kuriwe.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/vulon.pdfIn PDF document text
    • http://laskod.hu/userfiles/file/januwa.pdfIn PDF document text
    • https://frutalmente.pt/site/upload/file/549736604.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/gakiwoli.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/1546770482.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=screen+mirroring+computer+to+phonePDF 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_off0000e41c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41C 17944 bytes
SHA-256: 38ae8882d6df5aa433c1556aaf61b1d9f5764c6c43d52e92f72615554706a368
font_01_sfnt_off000112c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C1 10620 bytes
SHA-256: 780efb6a70029439ed040464e5f75e2f16c28581431c07e826ed9c4e8b7ce8d8
font_02_sfnt_off00012ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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