Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e0ce72c19bced8…

MALICIOUS

PDF

76.5 KB Created: 2021-08-16 07:26:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: be36ae924543bfd060e4ac09ab1c0df0 SHA-1: e8c7b6c28bc02bb37594f1d1b7de457936a214b2 SHA-256: 94e0ce72c19bced8244db2621a2aee51ba6343df94e2c0d8cb8170dbf29f432d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS platforms or appear to be disposable. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. The document body is unreadable, but the heuristic firings and URL analysis suggest a link farm designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://savvyais.com/userfiles/file/40968971832.pdf In PDF document text
    • http://alexlunacoach.com/img/editor/file/rulituxunad.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/60763466054.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/7eb6380a8bdba925328bf2e4cf7a994d/kexagu.pdfIn PDF document text
    • http://overtonnation.com/clients/f/f9/f97855507a39dfa58978186db9bff07a/File/pizexolelavuwuvowepezexi.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3427e40e6e---gezoxar.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/39092802934.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/83848970774.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/7bed1223634d2ba1bcac04bd7bce4752/46938193979.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/706c742d1ac582511b88984108bca485/19437640677.pdfIn PDF document text
    • http://indecomavo.pl/inc/bureri.pdfIn PDF document text
    • http://edu-tur.ru/userfiles/file/kusuzipemukobileroxen.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/38382521526.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/17305516921.pdfIn PDF document text
    • https://senfina.top/uploads/files/88829433792.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/supananejakikosibexi.pdfIn PDF document text
    • https://samsungklimalar.com/upload/ckfinder/files/fazidawilafonimokidupok.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073aee6dd461---tugavifuwevilafutinoduja.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e9babf66b---40999415269.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6auqakval1f6ohv8es78375q00/lulatesotibojaxuzikubaruf.pdfIn PDF document text
    • http://poexali.org/static/image/_u/system/files/56534754548.pdfIn PDF document text
    • http://print-resource.co.uk/ckfinder/userfiles/files/feledoxepafidexo.pdfIn PDF document text
    • https://europartner2.pl/uploads/xovutixexedefakaguxepiwi.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a8a7706a6---sapuk.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084341965e35---18060769746.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=m%C3%BChendislik+istatistik+final+sorular%C4%B1+ve+%C3%A7%C3%B6z%C3%BCmleriPDF 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_off0000c365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC365 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7C 11580 bytes
SHA-256: 30ecd0cf7b28a445de9446217bd9dac37d87de577024a8af11d7031bb7b4a016
font_02_sfnt_off0000f5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F3 18116 bytes
SHA-256: eb95880d92412c4314005c9bfd1f82b56753d12822f3864bff91408c05affe93