Malicious PDF — malware analysis report

Static analysis result for SHA-256 519ef8a8986567ef…

MALICIOUS

PDF

78.2 KB Created: 2021-09-06 19:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b694cb8a7d495c086437c29cefc139bd SHA-1: 7429479703e86e431cbbaa623ce499ac46ffa89e SHA-256: 519ef8a8986567ef3a337d465ef270d8b796c6d6cdb32526837d382bf9084a65
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple compromised websites and potentially malicious PDF files hosted on various domains. The presence of external URIs and link farms suggests an attempt to lure users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://idealhca.com/admin/images/file/1904785481.pdf In PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/0tgea347qms3i85a6ave82vcgn/19769205918.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/32230363225.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a089e426e61---vuxadap.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/7f317880eaad8695030d0c4f2858b160/safemot.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/konomukolobago.pdfIn PDF document text
    • http://osmed.cz/app/webroot/files/files/56496388422.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/fc43b601d07b4a896f00394b114bc7c5/12550505358.pdfIn PDF document text
    • http://vlajkylevne.cz/UserFiles/File/gejaroduxokeg.pdfIn PDF document text
    • https://nergizleryapi.com/image/files/wosodezibefetabunimel.pdfIn PDF document text
    • http://beming.com/ressource/site-image/files/fulofufetotowofefud.pdfIn PDF document text
    • http://toyotaquangninh.org/data/dulieu/files/ludoleji.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/42503991910.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/nodumaxutijotirivu.pdfIn PDF document text
    • http://rbc-bezorgdiensten.nl/upload/kibunitewafid.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/21941401277.pdfIn PDF document text
    • https://designclarf.it/file/64465467596.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/003cfa028d9c1a4a521a6453d5ea1af0/28788853850.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/53186330770.pdfIn PDF document text
    • http://freeware-software-download.de/uploads/editor/file/38012637200.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9d4c21985---sijijowisinefaduvaxaxe.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/a0a198ab91e44455a85b47401868313b/renujirixe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=crkveni+kalendar+2019+pravoslavni+pdfPDF 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_off0000ce08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE08 17304 bytes
SHA-256: ea6501c57162d1388bb953148fa311f797c31b9af13353a461912376d0ae8812
font_01_sfnt_off0000f958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF958 11044 bytes
SHA-256: a535fb03e23eb77737c95b5ad9688fc1f7ed4960c5136abbf2fe452c8b70293b
font_02_sfnt_off0001133b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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