Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc474d2b18347850…

MALICIOUS

PDF

63.6 KB Created: 2021-09-20 13:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e566607b5f845c1f30e8bf4ebe870335 SHA-1: d9de39d5d52dc5996f611a5eb9c051291daa2b85 SHA-256: fc474d2b18347850ee5bc237e89837936675992067adf9cb0a8dd4a96e2db298
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier. It contains numerous links to other PDF files hosted on compromised CMS upload directories and disposable hosting, suggesting a link farm designed to distribute further malicious content. While no scripts were directly extracted, the presence of multiple compromised URLs indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5690

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://imi.vc/upload/files/datotipop.pdf In PDF document text
    • http://leton.pl/userfiles/file/benujisu.pdfIn PDF document text
    • http://thegioituigiay.net/uploads/files/serul.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/6839158262.pdfIn PDF document text
    • http://studioguatta.it/userfiles/files/panajenugujosine.pdfIn PDF document text
    • http://greathorserider.com/ckfinder/userfiles/files/juruzok.pdfIn PDF document text
    • https://yomadesign.com/userfiles/Proj_Name/files/kapovibutu.pdfIn PDF document text
    • http://nut-shell.net/upload/files/32716116621.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc68d638de---waxamadoloximezojisugow.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc7e31e4e3---97433477726.pdfIn PDF document text
    • http://china-shengbang.com/upload_fck/file/2021-9-20/20210920063100261008.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16147c39318476---tidubafupif.pdfIn PDF document text
    • https://jaurrieta.net/USERFILES_JAURRIETA/files/bekematirixizepobonivife.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/paleliw.pdfIn PDF document text
    • http://agriturismolescuderie.eu/userfiles/files/53633460677.pdfIn PDF document text
    • https://e-ssuances.com/ckfinder/userfiles/files/gabugemitawifu.pdfIn PDF document text
    • https://themalc.org/files/file/setojijikitabur.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16130d1ebc6296---difixupofijafupuf.pdfIn PDF document text
    • http://defhjdr.friend-match.com/upload/files/57949492601.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/bee22c8e0fec08a2dd3ea85dbbe2ee3b/xasegubanevasib.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/faxowedakutegunawepa.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1631435359.pdfIn PDF document text
    • https://mtmhomeschool4art.com/mycms/uploadedimages/editorUploadedImages/file/950463442.pdfIn PDF document text
    • https://retake.dk/ckfinder/userfiles/files/fijosededibogobol.pdfIn PDF document text
    • http://xinghui.co/upload/ckimg/files/202109080910364867.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=punch+hero+androidPDF 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_off0000c1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D4 10256 bytes
SHA-256: ff09161b484cc09b0c0972016448aae80888380c77b364d5bd6cd34d76082731
font_01_sfnt_off0000d8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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