Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ca41733d812d10…

MALICIOUS

PDF

82.3 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: fb2d86d716cabe98dc94167c5570d550 SHA-1: f71a15e059f64dc5e176382676275ea605a254a7 SHA-256: 08ca41733d812d1054940188910ead48aee0db2e29441ac8295efe4770631f18
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to various domains, many of which are hosted on disposable or compromised hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the structure suggests it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • 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
  • 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 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://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 3

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
font_01_sfnt_off0000f60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60F 17716 bytes
SHA-256: 229215afbcdb5a8cffabf602495c1f4fcbaec362821aa0612adc5edea1f2395d
font_02_sfnt_off000122e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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