Malicious PDF — malware analysis report

Static analysis result for SHA-256 04bdb69ca92bd625…

MALICIOUS

PDF

61.1 KB Created: 2021-06-08 11:13:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d7b05369b71a905331b9aba9fad8a2f9 SHA-1: 4eafc0d6e4e6e5b2c8f779f9f414bda0bc4dc766 SHA-256: 04bdb69ca92bd6254d3d92756950cec4daa12bef8e30a042f56086072e370a88
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a large number of embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

Heuristics 5

  • 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
  • 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://archism.ru/uplcv?utm_term=how+to+use+pen+vape.com%252F2 PDF link annotation
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab85be6e8d2---kivubegigoxi.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/31b8fd44cec7e80bd83153eaf228a9df/13854230180.pdfIn PDF document text
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/212a4b0afe2860541e8b24af9a56e011/lelimatuvokan.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/hd2sp6bqmar3nlkf3lck6nptv1/52972739281.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/manofutu.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072a9a58ed95---99143107671.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d4f4f2822---98861918975.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/kus70ne2goujgm83ji4s7ioeo6/parataso.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/51735a3b04663563efc25722302b5514/bukoripawoxukenasegi.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/13098735600.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/3260717ed0a0001ef0439d77a2b1742c/bipabi.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/abdj7fi5tbc4ed3q43k2t3gtm5/bajoj.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/524c972cb6183af17b4e6403b7a6e422/97363384762.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/7c8702d298ce6c176ad4b68930db44d8/93374985219.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/ejpisci293kui0dkrdgdficskg/pokote.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/csds40ljn713qh3hi1q5b357vt/26159575011.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD485 5264 bytes
SHA-256: 41d2db617c34a051a3e7fa43cb62256001b7b4553b4818af174d971566f8ca6b

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