Malicious PDF — malware analysis report

Static analysis result for SHA-256 9adf374832a48974…

MALICIOUS

PDF

79.9 KB Created: 2021-09-16 17:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 629b7d638ff2e0738e66b62dfa415f73 SHA-1: 4bc9534b1e482ec16fb9cc1af5f51ae4cc2ddb36 SHA-256: 9adf374832a48974ebc2fa6215dd2b2e416eac0f9e740ca23d8eecf2fac0dc3d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple PDF files hosted on compromised websites, suggesting a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious, and ClamAV also detected it as a phishing trojan. The presence of multiple external links, some on disposable hosting, indicates a likely attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://edenestates.com/ckfinder/userfiles/files/13211828618.pdf In PDF document text
    • https://lifo-sea.com/ckfinder/userfiles/files/gixamoxifirifiwuzef.pdfIn PDF document text
    • http://sns.hu/_user/file/zobofusub.pdfIn PDF document text
    • https://letajicikoberce.cz/userfiles/file/zilasomuzilalijisojivato.pdfIn PDF document text
    • http://simsoncantho.com/userfiles/file/78863453866.pdfIn PDF document text
    • https://mosaicopeoplecorporation.com/ckfinder/userfiles/files/37480033670.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/f4d86e1335ea18e1f41b5a85f28575f8/8643151598.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/defemegigevines.pdfIn PDF document text
    • https://akrmedia.no/ckfinder/userfiles/files/5992978618.pdfIn PDF document text
    • http://k1a.ru/images/files/file/wivavomuboroxazikozo.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613164264c531---kuletamukimo.pdfIn PDF document text
    • http://anduong-nhatthanh.com/uploads/news_file/93797832012.pdfIn PDF document text
    • http://digifast.cz/userfiles/pizawijobunuwejobofumoxi.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/8f9ce3332cdb481d85d8acef4623a783/81667703296.pdfIn PDF document text
    • https://proetcontra.hu/userfiles/file/sinaderafadesuwenanuk.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/bunelevoronaxe.pdfIn PDF document text
    • https://bulendengin.com/upload/ckfinder/files/40345323730.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/xomajasezoboj.pdfIn PDF document text
    • https://geloracinta.com/contents/files/16030255065.pdfIn PDF document text
    • https://hgqq.hk/tony/churchofgod/ckfinder/userfiles/files/dumifudopefonug.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/98528483493.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f8bbac997f---83433078521.pdfIn PDF document text
    • http://chayka-svg.ru/files/15714026192.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=how+to+send+file+in+facebook+messengerPDF 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_off0000d40e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40E 11128 bytes
SHA-256: df34b883908eba278e15103e0583bd0462aaae7bbb5e019abfc42951fe30bab7
font_01_sfnt_off0000eddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105ED 17416 bytes
SHA-256: f6c8a8fa5a6bd3098f22fc7aa282cf8c4e55af1e236dca6f487d8f80d96e6a00

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