Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9068cc8d4d1a14…

MALICIOUS

PDF

61.8 KB Created: 2021-09-21 05:20:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 99bab7ac69c5a4fdf69b9d62f67b6b74 SHA-1: 35bd487de8ed4aedabaea4cc29319ad25a0719ff SHA-256: 0e9068cc8d4d1a142adff23f3b26687e08a0269b912e91abea1020c02b646293
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is a phishing or trojan delivery mechanism. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites, likely to host further malicious content or redirect users to phishing pages. The presence of multiple links on disposable hosting and the use of UTM parameters suggest an attempt to obscure the true destination and potentially improve search engine ranking for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9142

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://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138db79a2520---sedepukigoruniva.pdf In PDF document text
    • https://shidoremicrosys.com/media/15141144446.pdfIn PDF document text
    • http://contrast.no/ckfinder/userfiles/files/88068528202.pdfIn PDF document text
    • http://clinicaveterinariagoitese.it/userfiles/files/85863502890.pdfIn PDF document text
    • http://dycelife.com/userfiles/file/kozawebotemaki.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161387d64be7d6---17437225430.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a7e20a3ee4---92640295128.pdfIn PDF document text
    • http://zhfangyuan.com/uploadfiles/files/pagolejifegixatiti.pdfIn PDF document text
    • https://sharkovinkom.com/sharkovinkom.com/ckfinder/userfiles/files/zukolon.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/pibedolitonutu.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/36428370790.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613821884a1ba---79615676789.pdfIn PDF document text
    • http://cuacuonanbinh.com/userfiles/file/dagurosuw.pdfIn PDF document text
    • https://sysyanginguvenlik.com/uploads/files/zaxukudew.pdfIn PDF document text
    • http://ulsantour.com/FileData/ckfinder/files/20210909_CD7AC0FB975E2BE8.pdfIn PDF document text
    • http://hidrometa.com/images_upload/files/nubepagewigupuxapigubem.pdfIn PDF document text
    • http://garant-fond.ru/ckeditor/ckfinder/userfiles/Images/files/88896569851.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/8475aea2a71f8479f6c5bf0e5ed726a8/riledaf.pdfIn PDF document text
    • http://futboltotal.net/images/files/25825556808.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/fibovasewekoratepuvevum.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/japeporedopimago.pdfIn PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/mepidadoj.pdfIn PDF document text
    • http://musicpark-live.com/userfiles/file/78507567264.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=firestick+4k+audio+delayPDF 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_off0000d45d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45D 10620 bytes
SHA-256: 33a230c3aa35b08def6c4a63256bb763808ece10e61a005fc179a33676566c29

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