Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c8fcc5e6661231f…

MALICIOUS

PDF

80.9 KB Created: 2021-09-05 14:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a04bb216c4b8ce6cb96154acaaf7dccb SHA-1: f3fc2751441a3c4beb654a7ec252d4b3d21f0899 SHA-256: 5c8fcc5e6661231f01a2741095480b51fbe3bcfb6a4099db3718fc4cc22970fe
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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 http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608329ad70e33---78724957112.pdf In PDF document text
    • http://thesprotia.gr/uploads/file/46941405855.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071054ddd8f1---19806204462.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/55831320209.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/ipatdbvegijbahe0hb27uq01c2/15240325950.pdfIn PDF document text
    • http://riverla.vn/uploads/userfiles/file/49852118163.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/pivunexevaxeg.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/lamevisot.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/010e4f3541e635cab96dddf356ae15a3/83118156158.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d5aa71289---suworowoguzaz.pdfIn PDF document text
    • https://dananeye.com/uploads/files/202108260105351423.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729b770dae6---bifonemunefilixafevaxola.pdfIn PDF document text
    • http://teaandtiarasmontreal.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/36752538592.pdfIn PDF document text
    • http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sejizilewivekukoxeva.pdfIn PDF document text
    • https://webdatedepot.com/userfiles/file/kasanajuvevi.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/a486588d72e2b2d9722888a36b4b27bb/5432749868.pdfIn PDF document text
    • http://bjjiffy.com/upload/xiziwugup.pdfIn PDF document text
    • http://zkmeiqi.com/admin/ckfinder/upfile/files/daginerebig.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/cira02cd1pqv84q6dc7ifc042b/25369193945.pdfIn PDF document text
    • http://studiotecnicomaglio.it/userfiles/files/73604944522.pdfIn PDF document text
    • https://mimpishio2bet.com/contents//files/pasebilavazasiwaveje.pdfIn PDF document text
    • http://thewellmanteam.com/userfiles/files/96672706027.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/7ae1e29c124a62b00dc8f4068eb4db56/78904970972.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/5e4c4c11d2af8b2276865c78833f57a3/91057999330.pdfIn PDF document text
    • http://dbhsreunion.com/clients/21010/File/lewefisowagumodelureka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=graphing+input+output+tables+worksheetPDF 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_off0000d539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD539 18092 bytes
SHA-256: 0d3f55a8a1f9defd864ca31232253b9515d2e86133f1b0fbf45e1360413749e1
font_01_sfnt_off00010447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10447 10988 bytes
SHA-256: d66e7682ff49a2ed65351ede8b99efdcd35aa64678e0e7a9d247a8444e001d9b
font_02_sfnt_off00011da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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