Malicious PDF — malware analysis report

Static analysis result for SHA-256 6da0d6f67ca0330f…

MALICIOUS

PDF

83.8 KB Created: 2021-09-18 05:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f5236a57beea5d21b212f0be577b8421 SHA-1: 516862b60537937eadc3c47978c03aa21a767382 SHA-256: 6da0d6f67ca0330f3641ef01ab3515a17ec701765b0e5afd8fa62d6dd9b8c4a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting an attempt to redirect users to phishing or malware download sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://jechrina.gr/FCKeditor/userimages/file/76732461747.pdf In PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614118371acaa---59751136899.pdfIn PDF document text
    • http://studiorumeo.it/userfiles/files/34038002913.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/32424957939.pdfIn PDF document text
    • https://juvelyrikoscentras.lt/Files/file/nevewekijusigajuzuwa.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/sisikowos.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff4929f77d---wevetapigi.pdfIn PDF document text
    • https://takipcisec.com/calisma2/files/uploads/57227494270.pdfIn PDF document text
    • http://ortopediaszombathely.hu/editor_up/wujazavepolewakuza.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613fdc687ccca---torazegazonalama.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/lokamosedu.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/20660549921.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1613952f67a6a8---lopijisajadodogevu.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16137a8ad3bbe0---34126755122.pdfIn PDF document text
    • https://ans5680.preneed91.com/upload/files/riseluz.pdfIn PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/ponevofop.pdfIn PDF document text
    • https://www.lsv-wittlage.de/ckfinder/userfiles/files/20741896462.pdfIn PDF document text
    • http://pravkniga.ru/files/userfiles/files/pusutewovivekidiz.pdfIn PDF document text
    • https://samuelben-horin.com/userfiles/file/dijevakexowepevoveku.pdfIn PDF document text
    • https://reviewz.eu/app/webroot/files/userfiles/files/xapanufemurije.pdfIn PDF document text
    • http://cpviettin.com/upload/files/vutazitisubimake.pdfIn PDF document text
    • http://minisadik-margaritka.ru/admin/ckfinder/userfiles/files/87997116131.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=netboom+play+pc+games+apk+downloadPDF 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_off0000e330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE330 11072 bytes
SHA-256: d9d3a6b979da2aed360a33efec93339f6da4aff1cef0a5c2072ddf0de79f5091
font_01_sfnt_off0000fcb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB4 17376 bytes
SHA-256: 5c248ff1f1588607cb3d0d76a24569ef1a739bbdb53a4324af401a7b0fca6f90
font_02_sfnt_off000129db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1