Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c00e7faa8386c9b…

MALICIOUS

PDF

121.0 KB Created: 2021-06-12 11:35:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 9a2fd88620d2ae5bd942667b4138de3a SHA-1: 1e06701063f6a8b374ce7c5974b60ebf8ee83a7c SHA-256: 7c00e7faa8386c9b11ec6ba8f30cae32494690da0cb01b22252aeb6904f13728
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links to external websites, many of which appear to be hosted on compromised WordPress sites. The document body suggests a lure related to 'Berlin two concepts of liberty pdf', likely to trick users into visiting these malicious URLs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://crysiq.ru/uplcv?utm_term=berlin+two+concepts+of+liberty+pdf PDF link annotation
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a011ddbd3---68356559289.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/76203626734.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/85c87d6cc5627205cfba2057f82d0cd4/5449016112.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/73477473347.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/ok3s6f65hvpuvepnomeleime36/13282267807.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/1b971cfc79a976123d7dd7fcd1edd361/88208012174.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/94193280527.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/xajarafuzisefopitope.pdfIn PDF document text
    • https://mszukam.pl/dat//file/xunelifagejufiweraxiri.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a70024d40a---janukugebosufulamaje.pdfIn PDF document text
    • http://laweasy.kr/userfiles/file/bufajasuzijena.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608618704076e---vegegevuxu.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/b115f004146a85bff8a1f3e8038b8ef1/61146099572.pdfIn PDF document text
    • http://planetamama.ru/files/file/27298422407.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/xonalisezugatunifepata.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a44be8ada61---kagefezubuzemukatorus.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0534660001620986088.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080c95c93ce4---1147454585.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160984bfa75cc5---vugaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019dac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DAC 5324 bytes
SHA-256: 4987b9fa64fb3f8bad923667a91d2258a1c27a8f3a152a3ad05b315e7b54d518
font_01_sfnt_off0001afec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AFEC 11152 bytes
SHA-256: 76d74aebbbad018e5b5616cacdca632eab4133364ecd08224f032942be6cb14e