Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdfbd29203475bf2…

MALICIOUS

PDF

66.5 KB Created: 2021-08-20 05:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d1c12bd20d8f58faeb4d2b1d9fcef4f1 SHA-1: 800e412c2779bd8e5e6111d70b15707cbf670ccb SHA-256: bdfbd29203475bf245a0456a847f106b379720ca75bba4ad206bc4f06a6d0df3
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 as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9524

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 https://allytemp.ru/uplcv?utm_term=how+to+cite+in+text+mla+example PDF link annotation
    • http://goldenteriyaki.com/uploads/files/dipowupejofudip.pdfIn PDF document text
    • https://marljivo.hr/UserFiles/files/70748161381.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a981b61197f---vutikusurugurulapolebonut.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/hp4jp0de5rtf21fgterh8praup/vabazosowevusiduri.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/12894941140.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/a21a09acbb5bb7dcf41ad47fcb7daed2/91645914882.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4e32f358d---zilojamebetewefewal.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/2m8mh0l5imh581n3qg374b07ba/kozepamidogobo.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/71063454188.pdfIn PDF document text
    • https://anfauglir.com/images/file/80735521295.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cd18b2c0c5a---nunifotodebaxenarofa.pdfIn PDF document text
    • http://www.romanschatztruhe.de/img/files/pezakalalogupube.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/koseduxukelijugamapunele.pdfIn PDF document text
    • http://washchienluoc.com/upload/file/faweleviwus.pdfIn PDF document text
    • http://funkyspa.net/ckfinder/userfiles/files/xonel.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3850db127e---vokew.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/marujuzolinerujarowi.pdfIn PDF document text
    • https://equalland.com/uploads/File/27265631051.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/50cfd6a6a0d1bb149a57818bebb8a003/96367939064.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160732e4150f30---mofimojomozike.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a51afa9b9ac---40860019441.pdfIn PDF document text
    • http://mediaworld.pro/ckfinder/userfiles/files/62185273302.pdfIn PDF document text
    • 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_off0000e18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18E 10444 bytes
SHA-256: dcb141f3b1c2e3fc5d08df315d2ff9d90d3531a179758c4669bd968f7fb4847b

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