Malicious PDF — malware analysis report

Static analysis result for SHA-256 080f6c1cf1fd7c01…

MALICIOUS

PDF

78.4 KB Created: 2021-06-10 19:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4d55cd5e0b5a6a295b40bf6b008ebd82 SHA-1: 9035d7973d3a7dd2f7e8beaac227b4ae3c131363 SHA-256: 080f6c1cf1fd7c014830e8955dab697009ec79ed4328379990d5461208e6473c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document functions as a link farm, directing users to various compromised WordPress sites. The embedded URLs, such as 'https://nomylo.ru/uplcv?utm_term=gta+vice+city+nfs+underground+free+download+for+pc', are designed to trick users into downloading software by impersonating game download sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nomylo.ru/uplcv?utm_term=gta+vice+city+nfs+underground+free+download+for+pc PDF link annotation
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcb16ea388---maxegadinaxadivijetakup.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949870a27ab---57909917542.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/tafalawozo.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/33990bd0cba07730460b995cbfdb2881/xibifofonowosa.pdfIn PDF document text
    • https://slide-bearing.com/d/files/72451646327.pdfIn PDF document text
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/g0vg72br1k4aoskapti465e7vc/zebisonerutavikopijerixi.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ee4737019---muxokexopenifagibexugap.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/7156786566.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160943c67123d3---wemolavanabekilufesadolin.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/funavunimisabafevigarebuf.pdfIn PDF document text
    • http://sukhabalka.com/files/file/rogewajevuzafunazifezaza.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/99b3ef44850f20b873985e12f6be7230/64898853405.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/b101ed6b5f104cb14956f880304787c9/6056473078.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b924d3181---xojef.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_off0000f433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF433 5608 bytes
SHA-256: 37c77d7e82f4ca5ae3b9a8cd43e2f603a6100774ed6b14ade0630dcc89c5a386
font_01_sfnt_off00010780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10780 10872 bytes
SHA-256: 2672f907aef844cad1cdde402897f248d546680981db18e47c31e2005887878b