Malicious PDF — malware analysis report

Static analysis result for SHA-256 301568f32a7131fd…

MALICIOUS

PDF

78.0 KB Created: 2021-09-03 06:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 762a7a9db039977a8c117ebb4d25b9ff SHA-1: 62cb67727a3c99c98a95a998daa5c8bed3d2dbf8 SHA-256: 301568f32a7131fd75a5eca0249006fdd327a11cedbe8e13db9ed7184ff092ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple compromised or disposable hosting sites. The presence of numerous unknown URLs suggests an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/dfpaspsc8jb6n9vssbmrdgnj28/90097459332.pdf In PDF document text
    • http://simpelms.nl/userfiles//files/kukefum.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97ecb42ba8---lasakodiwo.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b599d3f3b20---kitagurevadukipoluza.pdfIn PDF document text
    • http://www.mariabeckmann.com/fotos/uploads/files/wizaluwunusanevisevuxulad.pdfIn PDF document text
    • http://assistance.uz/images/shared/file/30776562287.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/0b68f68069699990b9795fd943ec9a13/sawolunefezuravakifulux.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1606d52f48fb25---34515195991.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c89a8ac876d---34825618560.pdfIn PDF document text
    • http://cnpair.com/userfiles/file/81072508330.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/8533edca5c2b650295bb5fff5696069b/jedumedezijaleloxefamigal.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2eea505409---gajafufumizeser.pdfIn PDF document text
    • http://enricobarraco.com/files/55018489332.pdfIn PDF document text
    • http://romangruszecki.com/uploaded/file/nusagi.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/1924959730.pdfIn PDF document text
    • http://www.ekoforte.com/upload/file/21505818288.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/bugitafijabovoko.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/90986381330.pdfIn PDF document text
    • http://skncn.com/u/files/bobelawufeguba.pdfIn PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/vixasexawunexokopenoxuxik.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f06ffb9857c---larenujuke.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611c1fb074860---gebopemesibojelegu.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/66388262539.pdfIn PDF document text
    • http://martonaroniskola.net/userfiles/file/20052846792.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=flatten+pdf+acrobat+xi+standardPDF link annotation
    • 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_off0000ca76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA76 10832 bytes
SHA-256: 99cb338f80bbf9ba1f39bd0518f56d5fff7d4c7a5492bba822274340c8415952
font_01_sfnt_off0000e34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34E 18148 bytes
SHA-256: 2abec1092472998113319a962b67208fe14ac56adced2065999e89da14aff8bc
font_02_sfnt_off0001124f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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