Malicious PDF — malware analysis report

Static analysis result for SHA-256 68f2daae533bd841…

MALICIOUS

PDF

64.0 KB Created: 2021-08-20 12:49:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 494c3ed3294b12e3e0c3f754b0f524c0 SHA-1: 3d0b3c4a8432c79d857b084d9c513b5b9bdff702 SHA-256: 68f2daae533bd841959b7a03f9b48287fd47d58e68e8722e8297415e33bf8bb9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The heuristics indicate the PDF functions as a link farm, directing users to compromised WordPress uploads and other disposable hosting sites. The ML classifier also strongly indicated maliciousness. The presence of numerous unknown URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

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://cl-pub.com/files/files/xewewomezopin.pdf In PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160bd0083ca329---repixunuzigogepimipaguxo.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/t1m07cn1322vu9n5jke8ucgg78/1456966791.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/rexidijavufodixatitifev.pdfIn PDF document text
    • http://poetische-malerei.de/web/editor/files/98678769822.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/58954111451.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/29539965041.pdfIn PDF document text
    • http://www.de.ruben.pl/ckfinder/userfiles/files/pibefijegiminaluwe.pdfIn PDF document text
    • http://zaintik.org/files/galeria/files/76923581544.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a57a78851c5---xegoxapulaj.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/xolaworu.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/f78dc39c326922e55f711d29413d5805/biruvivoliz.pdfIn PDF document text
    • https://skatrip.com/basefile/skatripcom/files/sixufajexewitujone.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/rolagavew.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210609235718601.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/15156094281.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/87611841507.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfad77d88a---futuwoxopesuda.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/bifavapuzova.pdfIn PDF document text
    • https://n-v-v.dk/userfiles/file/6036667821.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/38c80c3a1ccc792345c41f0ac770fa45/dasuw.pdfIn PDF document text
    • http://bachova-terapia.sk/images/file/22922981442.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=my+mother+never+worked+citationPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD702 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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