Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3b7d89d60b3c0eb…

MALICIOUS

PDF

83.8 KB Created: 2021-07-03 03:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: caf43900b76d76b432171b8c86cd31d1 SHA-1: 42bbffd81af1826df1b73ff4ddf1afe629de94dc SHA-256: c3b7d89d60b3c0ebdc106f5432ed720f2121316cae0dbc0d9a7e573c3a57f0c3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest an attempt to exploit users via social engineering, likely through spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://migger.dk/userimages/file/magagojizibawu.pdf
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/821c56b3235b11ba476d563cf51e23de/monirusabizoluduzi.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/j2uni3kb12enan00qkqnp2g323/26148594791.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160afb83618b19---lowabupivusi.pdf
    • http://vuatoyen.com/uploads/userfiles/file/84206869603.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/4f743cfc9c81f8acee6cf323999373d9/43803427333.pdf
    • http://slsnn.ru/content/files/bovudivasazurazorodosi.pdf
    • https://benqmusicworkshop.com/fupload/file/2211767251.pdf
    • http://botosani.ro/img/uploads/file/70915529733.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c450cd4fbb6---22417654474.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3340c7f0f---66096608564.pdf
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/83c99tmmp8fhfpbksup7ln8qai/damukapibijov.pdf
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/6db43835f29711ab8e10574b9ad8c109/lobudibitimop.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f16c1d8cb9---36200335025.pdf
    • http://mayamalay.com/clients/874202/File/xojegagi.pdf
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/5a5533c4d299216adf027ade0a499336/naruv.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609915818fcf9---joziwaniv.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/8ac2f6554f6eb27482d745fe4e11ce5f/lazisuxubekofifodile.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb38cc9a86---xujonegodak.pdf
    • http://gopherandsquirrelcontrol.com/admin/images/file/97328191282.pdf
    • https://dejavuruse.com/userfiles/file/bewetis.pdf
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/5bedee5a6bac2b96c83268881620b5d7/55129298163.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9d72e431f---70392389276.pdf
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/3964876a350a604035d9c6dd080ae4e7/fadup.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=4+cottage+grove+bus
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6b6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B6 16792 bytes
font_01_sfnt_off0000fecd.bin
b28d25b68dc7499fda48fc8d955aa196aec78568d8ad788e23633f7a847ed9d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFECD 10452 bytes
font_02_sfnt_off000116be.bin
e86857ef0fa04aef2874f218b85b390e39ceaf02f356fdac15261054207b0234		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116BE 16588 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.