Malicious PDF — malware analysis report

Static analysis result for SHA-256 102967e8e0a77e7a…

MALICIOUS

PDF

70.0 KB Created: 2021-09-28 05:05:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0532fe6db9e3a323829e75e5e61981ee SHA-1: a08c86b8a780283367dfd50d05bd47ecf56e2123 SHA-256: 102967e8e0a77e7a8725ded802ff0a2a609d2c76b85d58f4260f098f0526d8ce
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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
  • 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 https://catamma.ru/uplcv?utm_term=vidmate+app+free+download+new+version+2020 PDF link annotation
    • http://makesrealsense.com/ckfinder/userfiles/files/96059451112.pdfIn PDF document text
    • http://sartor.ru/upload/files/xavalepagunefadufazuvez.pdfIn PDF document text
    • https://at2-turbo-j3t.com/contents/files/jexufodeg.pdfIn PDF document text
    • https://bvphcn.bdata.vn/upload/files/65325159773.pdfIn PDF document text
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/sebaxefafixajutepebidosin.pdfIn PDF document text
    • http://sanfrancescovet.com/userfiles/files/fulidugupodiwemaxop.pdfIn PDF document text
    • http://lpc2529.com/piceditor/file/dopavojawexabazudip.pdfIn PDF document text
    • http://stfurnimart.com/file_media/file_image/file/mejejox.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/vesusigatig.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/farexedado.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/48993792537.pdfIn PDF document text
    • http://simpelms.nl/userfiles/files/nonikawobugajole.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/39525914104.pdfIn PDF document text
    • http://mehmetrasimmutlu.com/icerik/file/21326060935.pdfIn PDF document text
    • http://realcomfort.ru/content/upload/file/tolesosovujuvup.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/muwizajititosav.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/cf403bd6b310dc211bbd76c4e6279996/41202632821.pdfIn PDF document text
    • http://hbaoge.com/upload/files/nagomes.pdfIn PDF document text
    • http://sunmoon-glory.com/web/upload/files/70505834252.pdfIn PDF document text
    • http://yejiya.com/userfiles/file/74172933652.pdfIn PDF document text
    • https://mai-avto.ru/upload_files/file/sivepinonuzegigipiwine.pdfIn PDF document text
    • http://www.angels-rest.es/ckfinder/userfiles/files/wojepagokuxivefuwuku.pdfIn PDF document text
    • http://minerva-collection.net/files/files/buxokogutesamojavexewone.pdfIn PDF document text
    • http://mlead.net/images/e/file/bijokovog.pdfIn PDF document text
    • http://gachbinhduong.com/upload/file/38906433264.pdfIn PDF document text
    • http://bretagne.annuaire-regional.com/ckfinder/userfiles/files/kigixojapofisetemiw.pdfIn PDF document text
    • 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_off0000b395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB395 14512 bytes
SHA-256: 480e5f4fe6691a79f2061f146409bf796ee8fe5b601514842f68cd5359d37caf
font_01_sfnt_off0000d84a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84A 11024 bytes
SHA-256: 53d065e00b6e90cd56cb27853f68c92ce04e81faf1419cb35ff7b30276a8431b
font_02_sfnt_off0000f1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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