Malicious PDF — malware analysis report

Static analysis result for SHA-256 f502233802cb5b5f…

MALICIOUS

PDF

85.2 KB Created: 2021-09-03 19:05:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: be821dd653135b02a2c6138e5adc589e SHA-1: e509005c05213fb92cc8713d699e95a16eace227 SHA-256: f502233802cb5b5f5e9d9f538c6aed1363ae7d334a14a0b82c760d3dce36e7bd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It functions as a link farm, directing users to numerous distinct hosts, many of which are associated with compromised CMS uploads or disposable hosting. The presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM firings strongly suggests the document's primary purpose is to redirect users to potentially harmful external websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://cgeminfos.ma/upload/file/tozozawunedabe.pdf In PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160793a5f6ccd0---21201756747.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/68210178739.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/90385965600.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/11679100413.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcf5f157e2---14414278877.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/nqa1bah0mk2jj3dr9ubh7cl68t/97466387366.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160a9487d529ca---5274951741.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16076fb9063608---91428664520.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/7ce111269eb38ac71405983bb5d54101/93014484117.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/es4jdf7naagl4pggftsfjotbqq/32442115054.pdfIn PDF document text
    • https://unibel.pl/pliki/upload/file/94706214644.pdfIn PDF document text
    • https://andrejc.si/files/file/14088084373.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/9c3bc3c6d06da31b10bc639b16614242/44968181226.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/mapanagomividijilililugok.pdfIn PDF document text
    • http://sevoir.hu/uploads/file/kaxamatexuwomiga.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a21628b0a---gomuturofolajasoliripa.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/91081633658.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/at981mrg0avc5atdhmhdo9ol72/16824250211.pdfIn PDF document text
    • https://bevelec.com/bevelec/dossierMois/file/godosoberepuvuwi.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/jiraxukuzupavovip.pdfIn PDF document text
    • https://globaldreamindia.com/webcms/file/20632584723.pdfIn PDF document text
    • http://ilkyoukais.com/Images/Media/files/91041294702.pdfIn PDF document text
    • https://tnmkor.com/FileData/ckfinder/files/20210812_1A0EC2AD89DA5C19.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=bringing+nature+home+pdfPDF link annotation
    • http://irodori.kir.jp/files/file/bexutekino.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_off0000e71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF33 10884 bytes
SHA-256: 01fca08818d080ca151c4aff769a222fca7c83c6d68b65b57bb88736a19ae524
font_02_sfnt_off000117f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F7 18292 bytes
SHA-256: 2dd385e3f1b1121cec2343dd62cc732aab83fe6f02ea6ae45b35a59926b9f9c6

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