Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc34713d4b55e739…

MALICIOUS

PDF

83.0 KB Created: 2021-09-04 06:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f205cab17bee537b79cb50ecd6a53867 SHA-1: 616b4fea7e8132f1371da4712f86833e2728c1a8 SHA-256: bc34713d4b55e73941e371bd4fc2b47223bbecb460df0b87ac1f40f7423e4e36
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a 'Clipboard command execution lure' heuristic, indicating it instructs the user to copy and paste content into a command-line context, likely to download and execute a secondary payload. The document also hosts numerous links to potentially compromised WordPress sites, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/2u4pkdsn8a8ekjvf61scepf5jo/fesezubasefovebupilodabu.pdf In PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/93e0d77c75b4c3adba7f7e48af681ce1/30501397482.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/9878302404035b62015a443582c8724f/zopagafefosofukexuvabobet.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/45d72447c5719767275e73cbbe943979/7798485781.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/loxaji.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/jipegamiboworisipajavafup.pdfIn PDF document text
    • https://procogs.com/FCKeditor/file/11813768893.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d187b417213---96357027239.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/jodixifololifenisiw.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c9a0dba27---16539639801.pdfIn PDF document text
    • http://kramor.bg/userfiles/file/nupodosejulefubelobaz.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image//files/tejenedomosuxorusa.pdfIn PDF document text
    • https://netpage.info/userfiles/file/61883931118.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9f14902703---mupivirug.pdfIn PDF document text
    • http://kanstm.com/ckupload/files/60843497542.pdfIn PDF document text
    • https://invest.pl/userfiles/file/tofixula.pdfIn PDF document text
    • http://sinorarechem.com/upload/files/netupazujivo.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608776289e7b0---fukugizubavelosoferi.pdfIn PDF document text
    • http://scoutpate.com/userfiles/file/77326977928.pdfIn PDF document text
    • http://tlumacz-lipno.pl/pdrzewiecki/files/populipubunojepuziz.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/99284340213.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/834d5baede7f73437a3d2089f036d3e1/suvurafirebopobo.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9dfc9a464---24653432261.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/oqu2627rtssa0b9ocoe01uust3/85733581194.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/161095b31be79b---xavimetiduduvabububewar.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b083bac5f0a---pixara.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=mkdir+php+manualPDF 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_off0000de90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE90 10324 bytes
SHA-256: 324d71f9016fab01cca002467bfd8c5d076ba8ff47c24e9f738136f119eb89ab
font_01_sfnt_off0000f57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57B 18628 bytes
SHA-256: 17da60b995e0e7fc669335913a18ed7dd62e1319433215bc91a4d96c9043c66a
font_02_sfnt_off00012653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12653 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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