Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e06306ea5c260ee…

MALICIOUS

PDF

93.0 KB Created: 2021-09-20 21:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: dc370940a85bfe21e599ceb0d5328060 SHA-1: 52829cc549d9335c8b958c51f77fbbd95f4b8808 SHA-256: 6e06306ea5c260eeb0b9d4df25dafafc10b82de94f005ef34ee3017182c14363
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by multiple heuristics, including ClamAV detection as 'Pdf.Phishing.Trojan', and an ML classifier. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The presence of a 'download button' heuristic further indicates a lure to download a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://coretry.ru/uplcv?utm_term=game+ppsspp+downhill PDF link annotation
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/42d77b8b2ac77d5b0baa294c4f929261/sepigubabum.pdfIn PDF document text
    • http://noithatmfc.com/media/ftp/file/74475987532.pdfIn PDF document text
    • http://kondicionery-elektrostal.ru/upload_picture/file/devurok.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021090516445573499.pdfIn PDF document text
    • https://projectmine.hu/ckfinder/userfiles/files/26770556988.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/57628360704.pdfIn PDF document text
    • http://remobudostol.pl/pliki/rojadexumivewegaxedidesiw.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/68366063358.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/janulexalugiruvaterigonim.pdfIn PDF document text
    • http://hoya-system.com/uploads/files/202109180701169202.pdfIn PDF document text
    • http://abcgsgeds.friendship-match.com/upload/files/foridixorobipu.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/jonunes.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/d0797bfdf2ccb5ff2f4abb22192826a1/solomuzigutozuxonokexi.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/01a4ebaa0bab4b160840e51a4ca44760/9736464792.pdfIn PDF document text
    • http://otohondamientay.com/upload/files/91438245380.pdfIn PDF document text
    • http://potlista.com/file/files/lelimamuveteselexafali.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/piloxubegazakisujeket.pdfIn PDF document text
    • http://kbcsisa.com/upload/fckeditor/file/titolok.pdfIn PDF document text
    • http://chiari-web.com/ckfinder/optimist/files/kikevowovet.pdfIn PDF document text
    • http://alacarte-husum.de/userfiles/file/65487153028.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/09e245a9fac1126238640aa3095e082f/mebuzitujomewovidef.pdfIn PDF document text
    • http://itfkarnataka.com/cvsprojects/SSK/Source/2.0.0/images/files/28420621262.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/27395689817.pdfIn PDF document text
    • http://mariekevanvlierden.nl/survey/userfiles/files/95477821602.pdfIn PDF document text
    • http://fmi.lu/userfiles/files/vozexo.pdfIn PDF document text
    • http://mastervgtour.by/var/upload/file/47907485791.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_off0001002f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002F 10584 bytes
SHA-256: 5b942bcbe0c7fee422e24eeb449b85e8d4d42130514bb50f8d021579b4f6804e
font_01_sfnt_off00011827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11827 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13039 20720 bytes
SHA-256: 17910a9e76dd3517e491047f8e840196c40d28472298d12707af423272ae2bd9

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