Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b8a065e8f687dd…

MALICIOUS

PDF

83.1 KB Created: 2021-09-01 13:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 95cd382392e8facc14a5250d395697f9 SHA-1: a2a13f9d6b1dd63ac3ef655b0b4fb75bb91a8330 SHA-256: 06b8a065e8f687dd01bb9c5d4debae61ef0d8251fcef89e1ac3e2e45341d481a
156 Risk Score

Malware Insights

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

This PDF was flagged by ML and ClamAV as malicious, indicating it is likely a phishing or malware distribution attempt. The numerous external URLs embedded within the document, many pointing to compromised WordPress sites, suggest a link farm designed to redirect users to malicious content. The file's structure and the nature of the URLs strongly indicate an attempt to exploit users through a malicious attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://laborke.ru/uplcv?utm_term=polyethylene+is+which+type+of+polymer PDF link annotation
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/dururufelununujo.pdfIn PDF document text
    • http://hrzservices.com/uploadfiles/file/fiwabafejuzogutinos.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/5a456rqv3e8kumapdi392dt0c4/85734175289.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160988dad85461---mikip.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087599472dfd---juzisivutexuber.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c169d94ed---49642671288.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/fd3f25461e1d14187163419ef13b362d/vawarajigasolewa.pdfIn PDF document text
    • http://www.saito-ken.jp/userdata/file/31094264783.pdfIn PDF document text
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/66770334525.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/n2l8bnn0chvu850eblfbgqs8n9/43779553402.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160da27eb4881a---wadekororiwufol.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/simovozuruxunogivepobew.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/52784185695.pdfIn PDF document text
    • http://mutamobilya.com/images_upload/files/xopewufisezoxowi.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ec506e3b70e---simomodisiboragiv.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/8857050885.pdfIn PDF document text
    • http://elard-group.com/ckfinder/userfiles/files/wodidodofibufigejurilos.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/89750112107.pdfIn PDF document text
    • https://www.milestonesmn.org/ckfinder/userfiles/files/puwogosud.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7b8b56974---bokirilifusutafufa.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/susevomudisupasun.pdfIn PDF document text
    • http://wonderful-foods.net/userfiles/file/zepakozivimapofurafitije.pdfIn PDF document text
    • http://vektorma.ru/uploads/assets/file/tafujodaxafanivexasuwufaf.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/84359067723.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078daf6d3863---gevaboradivagekote.pdfIn PDF document text
    • http://baocaosuhoatoc.com/luutru/files/16656523954.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_off0000e03b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF852 10784 bytes
SHA-256: 9f2ab6e13488f583eef5badc358b981a791e31d90b31036730b96534910fbff6
font_02_sfnt_off00011108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11108 17692 bytes
SHA-256: 06ec23e3899d18bf034e910408046905dcc02e87bb5e47526c64d28ec7cb9ef4

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