Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e0e5e1ec7e03fc…

MALICIOUS

PDF

69.5 KB Created: 2021-09-11 01:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e399013cca4b9ad24e05d3e13a92d12d SHA-1: 7e77f330cfacd85e2d74165d460bbde3c38a7e0e SHA-256: d2e0e5e1ec7e03fc287003f07e8d77ccc9f4bd5dd66ccdaf28d20eb59bf207a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://medica-brno.com/files/gafezowofadefuv.pdf In PDF document text
    • https://ikorti-iao.com/userfiles/files/17075961883.pdfIn PDF document text
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/dezafofewor.pdfIn PDF document text
    • https://lajovisena.com/gallery/file/mawoluzapo.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb7da9f994---93838249722.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/novezilajuvu.pdfIn PDF document text
    • http://grafosaleservice.cz/images/fck_editor/file/11436951999.pdfIn PDF document text
    • https://siemreaptraveltours.com/userfiles/file/89744791324.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613231a4a236e---95552530954.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/57356571214.pdfIn PDF document text
    • http://daiichigroup.net/uploads/news_file/65859011364.pdfIn PDF document text
    • http://acutecardio.ru/sadm_files/kepisetevajitoz.pdfIn PDF document text
    • https://educhina.mn/editor/files/91556241912.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/giwivozu.pdfIn PDF document text
    • http://ingegneriarossi.it/userfiles/files/jidejatumi.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/7045791245.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613661ce98778---27444267052.pdfIn PDF document text
    • http://powerfalcon.net/uppic/files/1124254598.pdfIn PDF document text
    • https://businessincasey.com.au/application/third_party/ckfinder/userfiles/files/nivebafobevivemimajevodu.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/94909559325.pdfIn PDF document text
    • http://iberryhomemade.com/userfiles/files/pikoferakeselari.pdfIn PDF document text
    • http://forma8.kz/ckfinder/userfiles/files/sofoxe.pdfIn PDF document text
    • http://sanfrancescovet.com/userfiles/files/mubufo.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613123dd91a8c---69454572674.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/55ee2a7520b2807ca155839427bbbd33/31411784091.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=ime+messenger+%26+crypto+walletPDF 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_off0000b274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB274 15796 bytes
SHA-256: bdfd702524d79e63bb4d4b0d102292c76b86ebbde2aa19e565eeb6a259096669
font_01_sfnt_off0000dad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD7 9884 bytes
SHA-256: d9fab6d06d3c73196c98a9eaa88f789b05aa12053fca7dca54f788471f758786
font_02_sfnt_off0000f080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF080 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1