Malicious PDF — malware analysis report

Static analysis result for SHA-256 50463a140cd7829a…

MALICIOUS

PDF

82.9 KB Created: 2021-09-06 13:13:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a562b6fc2a98f4211e38d5466e0aaa4b SHA-1: 8281647985be3994b77f1eb5fc77a43baeaf51d2 SHA-256: 50463a140cd7829a377239ab8a83245f3b866008cdd5d23bfff671d953e1003d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous external URLs embedded within the document, many pointing to compromised WordPress sites or disposable hosting, suggest a phishing or malware distribution scheme. While no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly indicate it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://queure.ru/uplcv?utm_term=ordnerr%C3%BCcken+zum+ausdrucken+pdf PDF link annotation
    • http://hotelsandmartin.cz/files/file/vesusibinovi.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vimuxudunuvetizinopurunet.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d9103a813---69051021526.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2cbe26125---dulusiratizefesiwe.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/budefodobagive.pdfIn PDF document text
    • https://1tlstar.com/storage/uploads/files/20934355222.pdfIn PDF document text
    • https://paroles-vives.com/ckfinder/userfiles/files/18525360549.pdfIn PDF document text
    • https://fu-ko-property-agency.com/webroot/editor-uploads/files/xekegaxaxumixi.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d6706beea---nudobebataru.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/ugpj0l0ej7qqau7i6bnh2kk923/tanaxulijematijomomivu.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/3519b7e6b54f725337ae4e02eea9b8e3/86714835504.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/3f4cc5b879111f78911c95a15c6ee40a/loleje.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/wipazefoxakikut.pdfIn PDF document text
    • https://cylinder96.ru/admin/ckfinder/userfiles/files/72303053185.pdfIn PDF document text
    • https://nbretail.com.vn/ckfinder/userfiles/files/biwanisasatofujo.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/kunesogunazagijikise.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/fb77f2f87d7029e5b99ddf17515248ee/latiwemo.pdfIn PDF document text
    • http://prestopc.it/upload/file/74781884953.pdfIn PDF document text
    • http://nokianhakkablue.ru/ckfinder/userfiles/files/kowegejuxok.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/920a99cb2f6bc0e9d84e5f92f0a71da5/75807988750.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c73e652ea82---poriradujefebubasonapuwe.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/d95c0835f0418ab9f980bed5115e5a6f/mojuz.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/viwumajurijuveza.pdfIn PDF document text
    • 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_off0000da7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7F 10892 bytes
SHA-256: e853e27fd42a2bb049fcbd68965f542cdd5383ead8948279c6bead8fa7c485ff
font_01_sfnt_off0000f378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF378 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8A 19156 bytes
SHA-256: b12608a86156a03b626e24487e07e9d573f1a5bb08c29f6af8bcfc11d1bfcbd8

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