Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee328c9dd834cf26…

MALICIOUS

PDF

81.7 KB Created: 2021-09-07 11:10:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 330d10cc134af809f8b8b0292d7a1da0 SHA-1: 63dcd987f09a20d4aa089ac28c271576271e2411 SHA-256: ee328c9dd834cf26369ee2aef58a508190ebd3572cfdfaaeec7248f7fd039a20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites, which likely serve as redirects to malicious content. The presence of external URIs and link farm characteristics suggests an attempt to lure users to external sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 https://pixomot.ru/uplcv?utm_term=speed+time+graph+worksheet PDF link annotation
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f78318068f0---xebixuj.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b6a35c468---nagufujabefavu.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/thkn9cbplft33b8aii0h777gkt/zamut.pdfIn PDF document text
    • http://edison76.com/clients/5/54/54c13950cbd15a81e6fb4362eab8f273/File/wuvefera.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/12818154513.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/17059349448.pdfIn PDF document text
    • http://proxima-online.it/public/file/42531327187.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/pamazol.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/h04dpkkljlo7ursf0eauefbim3/vizuwidefikilomevumedijik.pdfIn PDF document text
    • http://goldenpoolandsauna.com/user_img/files/mowev.pdfIn PDF document text
    • http://restokrat.info/userfiles/file/57066281654.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/74304879128.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc2e989aad---funepakosutetiwadudo.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e93b800ed75---35224629722.pdfIn PDF document text
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87876800870.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/vapijutawajomose.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/sejinofesuwimalupas.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/vojase.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/78163cec1a634b4a38d2eba01b20b08e/gasenekowulamib.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d9f9d5509---77789869670.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fff93b71331---4410890907.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/lapakuget.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/6fi586g7ca90fqkc3t71sqs3d4/xajipofupite.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16116b9ada8e02---17631032215.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/62049234146.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_off0000d9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EB 17900 bytes
SHA-256: 439552c1cf6b1fbd719ded235045b245a29c5233c2436e9da33671871152836b
font_01_sfnt_off0001085a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085A 10940 bytes
SHA-256: 7ec594804a92cda037a306189f2fd1a317d24629bc6df3fd97fc3f1ff228ab77
font_02_sfnt_off00012195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12195 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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