Malicious PDF — malware analysis report

Static analysis result for SHA-256 7058dabd82274084…

MALICIOUS

PDF

86.1 KB Created: 2021-07-10 13:36:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c523b8d6d01c41acf19af3c59e9ca592 SHA-1: dca1444eb8ba673cd4135b1210350dd50b843e0b SHA-256: 7058dabd82274084cae0da5c97a52faf01b2068ce8b1420fd3156c535b8bd2a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and disposable hosting domains, likely for phishing or SEO spam. The embedded URLs and the nature of the heuristics strongly suggest an attempt to redirect users to malicious content, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://huntic.ru/uplcv?utm_term=meaning+of+sonnet+in+english
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/df8da0fc677ca5051a578cd9d2ec32f2/56922928865.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16073ca9a07836---25822134469.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d09253586be---40609435973.pdf
    • http://geredekombiservisi.com/userfiles/file/66603688027.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/le72u7429unkv4l2emav439ee1/bilujevugetasogerivatix.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6acc059df7---gexowaviwugofa.pdf
    • http://stlnsk.ru/uploads/file/luzifodelogijezuvazog.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160afb09887c88---74906697768.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/bfc6f15099ef782d02397d00aa80875e/79375815603.pdf
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/4c412cf446865c5c1b0a87e427049913/72182966066.pdf
    • http://x-site.by/upload/editor/files/66971085217.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/a388672d6cea0199c0602db8f2c49192/20128872014.pdf
    • http://digivideos.net/ckfinder/userfiles/files/59324289854.pdf
    • http://cristal-in.fr/userfiles/file/fewebekod.pdf
    • http://galantemontagnana.it/ckfinder/userfiles/files/40638225766.pdf
    • https://lapalettedesarts.fr/gestion/file/tewisuwitaz.pdf
    • https://k-barrierfree.com/FileData/ckfinder/files/20210622_85F3E4A78CFE6FE5.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/hhon2co5tc0ute78qn7do0lj79/50975120242.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c53db78c6---vifuxom.pdf
    • http://fotossc.pl/_files/file/72522470906.pdf
    • https://planet-pvc.com/upload/files/zeluduwi.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/aaf9ff8d13dfcf8ba6a013650bcde9ba/gozonexawexenamozifibefe.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd72a1451b---68778472777.pdf
    • http://www.aqsclimited.com/EditorImages/file/rovul.pdf
    • http://yngc.ru/admin/ckfinder/userfiles/files/logesokiwotimiw.pdf
    • http://moscow-vernisage.com/files/files/baresanave.pdf
    • 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_off0000ef86.bin
44673e0ecaf4987fee6efdf6c3dab997d26de6a45c2efa6d038ce38485b3284b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF86 10388 bytes
font_01_sfnt_off000106f4.bin
90d201bdf04cd1d0c64b609d78bcac7aaddac307da59c99288ff5a75acdbb465
pdf-font-stream PDF embedded font (sfnt) at offset 0x106F4 16948 bytes
font_02_sfnt_off00013320.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13320 16792 bytes