Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0379b6c83cbf3f3…

MALICIOUS

PDF

99.3 KB Created: 2021-09-04 16:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 673fc8b72ca627fc0b24968fd539a51e SHA-1: f1d7c33299b7d403b0dbf2c46d61d0a81499dc60 SHA-256: d0379b6c83cbf3f3572735b4f6d1887100d85725a1639cefff3afe5b234c1f46
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://pistant.ru/uplcv?utm_term=list+of+largest+producing+countries+of+agricultural+commodities+pdf PDF link annotation
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/56b89f82738a4cee6a5a42444c552989/18447182733.pdfIn PDF document text
    • https://cahayaapi1.com/contents//files/naxan.pdfIn PDF document text
    • https://ww150007.linebot.net/upfile/files/20210829204614.pdfIn PDF document text
    • http://lakshimi-kaatsu.com/user_data/packages/default/imgfiles/pojexuxedibisodowoxazor.pdfIn PDF document text
    • https://thefencedocumentary.ca/adminfiles/file/felibajupu.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16081e191b965f---juvek.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/40469770279.pdfIn PDF document text
    • http://psycare-spb.com/userfiles/file/88310679591.pdfIn PDF document text
    • http://laconchigliacasevacanze.it/userfiles/files/mobuk.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/5fl5c3hc8jl4rrsoip8ug6v734/43842013914.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/91257862722.pdfIn PDF document text
    • https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/6628ca5e1d2431389e7cfc72f644873e/84277601294.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/eb22aacd9046d5132f7b2494c35f02c5/55503051445.pdfIn PDF document text
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/1t9jqbl42bim8i2mqn8aivsbhc/sekufujiwijolivol.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a34d65980cc---xuvazividaroxux.pdfIn PDF document text
    • http://koddous.com/userfiles/file/lokado.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/8385350176.pdfIn PDF document text
    • http://mwcapital.net//ckfinder/userfiles/files/tepurevozamawab.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/gojaluvoxekivogurevigirid.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160712860bfaa4---9962174910.pdfIn PDF document text
    • http://www.nomorcantikjoss.com/file/gubexokifuvirezenovedos.pdfIn PDF document text
    • http://gistys.com/userfiles/file/xafimiminugorivumununerib.pdfIn PDF document text
    • http://canoto.us/Images_upload/files/zomudofamevikuz.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/66a08422c6407c536327017e032c917e/83082012487.pdfIn PDF document text
    • http://z-i-f.ru/userfiles/file/62959654162.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_off00011a9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000132b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B5 11020 bytes
SHA-256: abc4954527fa5abdbb33dd4b7ad545db74de41fec48dc0fffd58b47ffd5dd07c
font_02_sfnt_off00014c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C1E 19116 bytes
SHA-256: c0bdd0b0f0f46044b9096d1488e87dfcaeb50004098f941cf9007a99046e92cf

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