Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea7b9430ee63191…

MALICIOUS

PDF

83.1 KB Created: 2021-09-13 08:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cb25c2fb0b8eabbcc247d9a23320f526 SHA-1: 9d2a121a9cc4d5b44bb00b6fddcb6df388cbff65 SHA-256: 0ea7b9430ee63191cb28a1c09a5784df1993febf80c5178c99b01bb3a52c90d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress sites and disposable hosting. The presence of these links suggests an attempt to lure users to external resources, likely for phishing or malware distribution. No scripts were extracted, but the overall structure and heuristic firings strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613037066c152---bunigivitusev.pdf In PDF document text
    • http://lnv-cnc.com/userfiles/file/kazoko.pdfIn PDF document text
    • http://61kidsclub.com/userfiles/file/lifosekokugafaxe.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b08a28c82e---sufulafowezowa.pdfIn PDF document text
    • http://pamatudarbai.lt/ckfinder/userfiles/files/68608157106.pdfIn PDF document text
    • https://underworldgear.com/upload/users/files/81501154525.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16134f02c953a4---vixibitelobema.pdfIn PDF document text
    • http://masterref.ru/editorfiles/file/47629399614.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/28725364248.pdfIn PDF document text
    • https://lomasdelaweb.com/userfiles/2008.09/file/figomugubopalanotegazil.pdfIn PDF document text
    • https://grnca.org/img/files/files/tebagu.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/a1f5f1e552c269c1bc2f2691b8759e5b/todaboxibilez.pdfIn PDF document text
    • http://thelonerangerfanclub.com/ckfinder/userfiles/files/rewiwituwederamikuxisimo.pdfIn PDF document text
    • https://norservis.info/files/files/26631660735.pdfIn PDF document text
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/66342975938.pdfIn PDF document text
    • http://hangquangauto.com/files/61437012045.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/32412987732.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/wegarogovavipop.pdfIn PDF document text
    • http://saltokisport.com/uploads/files/35278936753.pdfIn PDF document text
    • https://marupyara.com/fotos/userfiles/file/23664216734.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/48768128968.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=roblox+mobile+hacksPDF 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_off0000df2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2A 10572 bytes
SHA-256: ee20809387ea9d7b6e941e31bb0c26213f1073d58e948ab782c346c812ce5843
font_01_sfnt_off0000f74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74C 18236 bytes
SHA-256: b2065626e0e660dec437d6b7a8ed02df62800a7cac688042a31fe392be012a51
font_02_sfnt_off000126d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1