Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eac54b65662207d…

MALICIOUS

PDF

93.6 KB Created: 2021-09-05 13:23:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7b99fa1d6506bd6e73f7ea78f81f6bae SHA-1: 14bfee00c563109b37881c0ce16d5ae624a5a637 SHA-256: 0eac54b65662207ddfa08b543cfde1a4a16c6dc54ed5d42597d1eec524ed7ceb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript stream is a common technique for executing malicious code or initiating further downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://synerhu.ru/uplcv?utm_term=que+es+an%C3%A1lisis+foda+pdf PDF link annotation
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f3d6ef1d9---worupiweluguwigekusade.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/mugesutewurabajad.pdfIn PDF document text
    • https://triosms.com/userfiles/file/65388793269.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/b1e15e44bf0219450938001130cc9626/fibifulemodesonasinumofu.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/nigefumibotovidajebese.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/48504001445.pdfIn PDF document text
    • http://tarnava.eu/user_images/file/vezagiruk.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b59ab2ccb2---fotoniguroruboroliva.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/4adeb2c2317d81f81fa89b0bf797b364/11869856663.pdfIn PDF document text
    • http://atomicattack.com/atomic/fckimages/file/gaxidixilowibomotal.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/25a18e1330e50ffcbd6b40ac3eb3073d/39526015312.pdfIn PDF document text
    • http://gptools.net/userfiles/file/xusifivokulolo.pdfIn PDF document text
    • https://aalatour.com/basefile/b2caalatourcom/files/58322692549.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/puperuxikefekemapubin.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/24302410384.pdfIn PDF document text
    • http://topcudental.com/img/userfiles/files/sasozunenuguketorewilojix.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/26054328930.pdfIn PDF document text
    • http://sjmhospital.org/files/js/ckfinder/userfiles/files/jemabalirapewisevosutob.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b328d8f3f3b---29261209701.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/161294b0262bf5---37953777526.pdfIn PDF document text
    • https://ardiinerkh.mn/uploads/userfiles/files/70314945096.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/setofuvezefosa.pdfIn PDF document text
    • http://sumnerclassof1976.com/clients/4/49/49b54eafcc86ae0c30eb104ab8b91c7c/File/gigowapinukivumixumu.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_off00010465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10465 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011c77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C77 19768 bytes
SHA-256: 2bf461b62d1dc3b7469833f0cada9598b60891a2a1d31b0cc25dbf5238c9ba34
font_02_sfnt_off00014f2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F2D 10632 bytes
SHA-256: 7695428e44df6b27c1b37fc363c6aada52a25d45ee27d84f6e587e52e0d13632

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