Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2bba24d807fb2fd…

MALICIOUS

PDF

88.8 KB Created: 2021-09-03 16:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: af8917bb51472dc2cef00d08f57bda8c SHA-1: 7cdc3edaea858ee006bda8be83a6abd306ea5200 SHA-256: d2bba24d807fb2fdc5fe841e24d489151e7b446697786c02e1a970a5052e9381
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, many pointing to compromised WordPress upload directories, indicating a potential distribution point for malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://www.mds-horizons.com/upload/files/17036581284.pdf In PDF document text
    • http://ciarajewellery.com/editor_upload/file/tawubujeniwotavidanokog.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/13699254152.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///48461497518.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abb122a0d0d---jowisidazipiwelu.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/kurutagibikaj.pdfIn PDF document text
    • https://barcelonacentromedico.es/files/galeria/files/72885075902.pdfIn PDF document text
    • http://fashionflutters.com/ckfinder/userfiles/files/soxes.pdfIn PDF document text
    • http://flirdining.com/uploads/files/tozutuvebofelepigug.pdfIn PDF document text
    • http://millecolori.it/images/file/mamukijojixipimupep.pdfIn PDF document text
    • http://dichvu12h.net/userfiles/file/68397673654.pdfIn PDF document text
    • https://edarky.net/data/file/kofidilamiz.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/2f1e17bfb48d7c54b22f178d7ac7f02e/zoxewewe.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/femeki.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a841ab17fe4---nawexamegukiliwezeluzuxuv.pdfIn PDF document text
    • http://studiorapizza.it/userfiles/files/zowinojujojeretodago.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a184dbd9161---wovominepuk.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1610e2dc7cbe82---xodeparofaledebazunovuf.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210620081934.pdfIn PDF document text
    • https://honghow.com/ckfinder/userfiles/files/57341662298.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1aef5bf4dd---35295754214.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/sagujumewetu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=open+pit+mining+equipment+pdfPDF 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_off0000f592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF592 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA9 10516 bytes
SHA-256: f920473b3c47b18bd8ea944ef040443aa71a98836b3c232b39d416dfd3bb0463
font_02_sfnt_off0001250e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1250E 18568 bytes
SHA-256: ee20b5d4793c0c0cbab11924dd461bab56ddda240232d57550eed111f4e815c8