Malicious PDF — malware analysis report

Static analysis result for SHA-256 7965f406985ca84e…

MALICIOUS

PDF

85.2 KB Created: 2021-07-14 09:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 46af8d53c993c8c0d715760dae558245 SHA-1: 4706876abfc46561e2f8670e9537b0ddaaa43d55 SHA-256: 7965f406985ca84e73a41ff91dfe359941320e41e1807430b4c6fc3eaab71cc0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a specific ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm designed to redirect users to malicious content. The presence of external URI links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://huntic.ru/uplcv?utm_term=conceptual+model+in+dbms PDF link annotation
    • http://szao-spb.ru/images/news/file/11945224024.pdfIn PDF document text
    • http://ulv-fogger.es/d/files/66571568336.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/famewawufuvajiti.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/0s7lq3mjkk6u1u77slsqunds8t/relafovezobazatinesojo.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/d0c431155bcdd49c8e04509d63406641/wudovilogo.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/ib19d3vusfutuh1qudgu1ih79u/52357583888.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/95ba33adc31cc53cb4e220938ed801f1/95760202539.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ec9e55698---82694802606.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/71537023827.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c88a7916b3---63241914134.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/95362804766.pdfIn PDF document text
    • http://namlongprojects.com/images/uploads/files/lawevosivanarev.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607854b4c72ac---mupurapo.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608223306bbdd---1574660446.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16097940baeb98---vojarolevepaxutez.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/51672548402.pdfIn PDF document text
    • http://carefirstwalkathon.com/clients/8/89/89514deb4c0e8807eb046cac28c4977f/File/puvebororajaxo.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/tuvore.pdfIn PDF document text
    • http://bruisedreedfoundation.org/clients/4/4d/4d9d7eec3bf3a09fa0457ace138f6a4e/File/luzomaluwoj.pdfIn PDF document text
    • http://klefmarken.se/upload/file/44462277363.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/josidobamivol.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/18515541550.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd80441ce77---41591881870.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/r900e2n132tuvn1qjksm671oq5/pixivanudufujetilumubopud.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_off0000ea1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1C 17000 bytes
SHA-256: efb614054bae6779683022046c7c0e00d6b41dc40ce1c1c259728938edb3e203
font_01_sfnt_off0001168f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA6 10844 bytes
SHA-256: acc771e305b1030309436b8056cbd72062b38bf07b2d2917d116f5cde132226c

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