Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab8fbe9602752af2…

MALICIOUS

PDF

109.3 KB Created: 2021-06-29 14:33:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ad8c9f5138c17066faf5841337e93af0 SHA-1: 442220b0ce42618f2d5067d7e264328f0a959a3e SHA-256: ab8fbe9602752af213543ae1de1020157f1975b05c69fa842551ae6cfce44589
154 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to websites that appear to be compromised WordPress installations. These links are likely intended to lure users into downloading further malicious content or visiting phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6255

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 http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4f4bbf5df---lirobutodetojukun.pdf In PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/8eaaa591ba56f10c3347e559c5ab581e/fugusuwen.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a15f30f1608---61091922774.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3628f074e---fudikemupe.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160a0aa52eedc6---dunuzitafe.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc45d86f454---pedesefozulopaxe.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/63623901127.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/81522591392.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/5dc2bf9d8270cc2ae5ec0548bb47d1e1/rudoxulivazeroke.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/831bfa749f15549874a88106c8d75a92/posusugexave.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/52132407525.pdfIn PDF document text
    • https://stopserv.ru/files/file/vubaj.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/51aba5120612019ce8f0cfb348f17bb3/nigitemiw.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/eea571842143bdc4137b3a1d507dc3c5/soburanunenotimuwojofakar.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/varodugabiwawez.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d873c706cc---83943964119.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/8967733f0751c63291083e05fa8cf392/41482913050.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081bbd0b25ae---66965300371.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/u40b992avmtus54nj127sklj42/sazepoza.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/gtg6ebgplv2ra5jj94b6epvcm1/11552758993.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1bb37dbd4---70055500699.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/c3f683376bc1254a47d15e384aec7433/rimadibok.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/parisaxomavere.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/c0iovcg9jqba44psmt92cspr9v/35897016364.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=paradise+lost+annotated+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001740b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1740B 10492 bytes
SHA-256: dd52082bb70e34ee1fbf3a60dd1e1c57d52ad3ab8ba764ceaa5a5d272692ec46
font_01_sfnt_off00018bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BF4 17684 bytes
SHA-256: 05605df035165578a476fbb12da7988b7949a3a7fa6da740efcbf90e7dd62fb1