Malicious PDF — malware analysis report

Static analysis result for SHA-256 35326b393c62f62e…

MALICIOUS

PDF

67.4 KB Created: 2021-09-17 09:26:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bbeb9a8a8cded8be3a9616f24c66b30e SHA-1: 04039c67d4a8a60d3c63a1682813be1f9a4f686f SHA-256: 35326b393c62f62eddfc71f545f4ccc30cf5d9b9990a9361526155501b8e4f73
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs that point to various domains, some of which are hosted on compromised CMS uploads. The primary purpose appears to be directing users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5155

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://seasonmediagroup.com/pic/file/39009694545.pdf In PDF document text
    • https://phoenixturkey.com/upload/ckfinder/files/woxunise.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fakuxejunu.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/junewinerer.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/juvijogubalaw.pdfIn PDF document text
    • http://1544-7419.net/upload/fckeditor/file/46321453253.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/kigoxuvusupoxoru.pdfIn PDF document text
    • https://mimpiindah2.com/contents/files/bizit.pdfIn PDF document text
    • http://intersonik.eu/upload/files/vogejojinurolerawedidepow.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/11464078621.pdfIn PDF document text
    • http://voyagevietnamlaos.com/hinhanh/file/baperas.pdfIn PDF document text
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/kupidememunad.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff03eb724a---83951240924.pdfIn PDF document text
    • http://poddertradingandindustries.com/userfiles/file/33610793436.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/11094731584.pdfIn PDF document text
    • http://alatasfilms.gr/ILC/img/file/rinavizojabumifif.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f791b673d5---wotujeriketowuwu.pdfIn PDF document text
    • http://gzcil.com/uploadfile/files/24573084854.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/22287198140.pdfIn PDF document text
    • http://tucsokszekszard.hu/images/news/file/vijekuruziwano.pdfIn PDF document text
    • http://sdv.sk/userfiles/articles/file/vetosav.pdfIn PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/fafipukipifepibivutenupe.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/161344ee48ece5---90199079692.pdfIn PDF document text
    • https://uroci-kursove.com/userfiles/file/31700385755.pdfIn PDF document text
    • http://slsnn.ru/content/files/71809389163.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name/files/48180394112.pdfIn PDF document text
    • https://jeevandeepspecialcare.com/ckeditor/ckfinder/userfiles/files/fagojudeji.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4d8a35022---nejijopufuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=how+to+write+envelope+to+po+boxPDF 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_off0000df08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF08 10300 bytes
SHA-256: 874da04a541a1d76c5802ec4a187d4aa9002cce05ae83c82a98d6cc3f6541999

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