Malicious PDF — malware analysis report

Static analysis result for SHA-256 60166e87d5cc8893…

MALICIOUS

PDF

74.4 KB Created: 2021-09-01 22:28:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 810c4e6dbf7311a4a6920e3b918a704e SHA-1: 3ef13e7b586fd1ec2e6b1a78f379564e275a7ea9 SHA-256: 60166e87d5cc8893fa6da24eab931f3a8776a917863a5c4c4aa4ba329e9180cd
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, forming a link farm. These links likely serve as a lure to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://aitrans.org/UploadFile/file/F1202105261226349229.pdf In PDF document text
    • http://cesishotel.com/res/wysiwyg/file/44519300845.pdfIn PDF document text
    • http://bungefamily.com/clients/5233/File/20640012216.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1608b01c719cfc---96243586938.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/vibefub.pdfIn PDF document text
    • http://stananddiane.com/clients/6/67/672a2699e369d648dd23e03de9deda78/File/16878318041.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210824_9C6F1D81FC174047.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/uoru57bjp358bnb0umaulnqpau/dolimagopelivasefa.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16223482627573.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/d3968a584d93c53c7edd166e3822342b/wukatizemotogex.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/zosimujuniwuzopuvaba.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/f87735380d9f67e76ad5c8273a2c3611/rinimubemetexujuwa.pdfIn PDF document text
    • https://aksusu.com/upload/files/51210496193.pdfIn PDF document text
    • https://wisserarm.nl/app/webroot/files/userfiles/files/kanonadivelirowutiko.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/fajefifubigerutuvogaves.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ffdc47386---zesipukapinuza.pdfIn PDF document text
    • https://subarini.ro/mm/file/741711921.pdfIn PDF document text
    • https://daiichigroup.net/uploads/news_file/weretifelaxogajerilita.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/28897376711.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6c8758623---39333895105.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/jpioasfe4pp6vst3gqt2a61mf5/22265336530.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609baae4b25bc---91863754543.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612949d1e78d3---79420447303.pdfIn PDF document text
    • https://educhina.mn/editor/files/33772425163.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/85881504376.pdfIn PDF document text
    • http://riph.pl/userfiles/file/zakobatezuresep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+sell+bunker+on+gta+5+onlinePDF 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_off0000bdac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDAC 10828 bytes
SHA-256: beea55b7a3b0b334a9ca18e129fdbc964d19bef033b37ad912a98c978d4b253b
font_01_sfnt_off0000d6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D8 17052 bytes
SHA-256: f29f9458ecb3d518535a1ceb0a925d539f78720c5a0c54f3439932b420a6bb7e
font_02_sfnt_off00010326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10326 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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