Malicious PDF — malware analysis report

Static analysis result for SHA-256 e208072554d3c2fd…

MALICIOUS

PDF

199.7 KB Created: 2021-08-01 15:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e4b4c80902b5fca5cac3e064e14c74a2 SHA-1: 098f25f397b420076d4991b1e1ebe7d02c1667a9 SHA-256: e208072554d3c2fd9ff28629a6559eb81efbbd7ac33b058d4c9adef30152fe55
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm suggest a phishing or malware distribution scheme, likely involving a second-stage download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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.
  • 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://fcr-fomentoconsumoerenda.com/uploads/files/sazagewobodevotoxatidu.pdf In PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d2b004627---35483425333.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/govorawotefebopapewafe.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/h5pdkv6ovajat1mip71uonop93/fadiwetarafuwe.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/tawudixemikekixifusereb.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609982fd4c72f---91774957781.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/wokoxabopuwamunoj.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/d7994f12048cf30e1be2af4b1aea3b3c/81359902276.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608388623cb28---rumawazexosutomig.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160702f833083d---38367564502.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/qio4mviehnhctorb96m5crnl5i/vewejulomijivapumobunakas.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/d6089fc6968874596474a82a96a45fc0/52535276052.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f9b87adf3---vemolawagetirujelot.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/rizazelaxotafojotaripuzu.pdfIn PDF document text
    • http://cheapmarkt.com/userfiles/file/59495064464.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/bopixanezigubak.pdfIn PDF document text
    • https://sinhadventure.com/uploads/file/4263092734.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/d6c747aaee1563f439538556cca1b49b/31558090555.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607769667806c---19955635676.pdfIn PDF document text
    • http://cosmik-kino.ru/sadm_files/kutaxebutajovataguf.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/99611259789.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/97d020157c3f7a37183e36bb8346e896/87626024437.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e7ce7f60e---notazug.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e77cdcb82e---88216448478.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/seketif.pdfIn PDF document text
    • https://le27.fr/docs/file/zijadivedepapitadu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=basics+of+biblical+hebrew+grammar+third+edition+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000276c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x276C9 18700 bytes
SHA-256: a8522480d71d794195f071394fadaca468af46b54f6bd3d74c3c92db3b588cb1
font_01_sfnt_off00029589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29589 31768 bytes
SHA-256: e1e80656f139a4c585027df64e5197a80cda7e567c51487237f0ef37beba8ad2
font_02_sfnt_off0002dcb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DCB7 11344 bytes
SHA-256: 90e0c981a3aadf8fdf569ad26b07be61e7b108910266abd5bc4b0ba5b28f8590
font_03_sfnt_off0002f6ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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