Malicious PDF — malware analysis report

Static analysis result for SHA-256 66c2ef7efb557b75…

MALICIOUS

PDF

83.3 KB Created: 2021-09-01 14:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 296874c1809534aa41314cff7cd18583 SHA-1: a939f8b72dcc34e3dd0bdc0a05b68f6149cf9ea7 SHA-256: 66c2ef7efb557b758ab00133a1cb210bab8e401b681405ad0936c074b36b008f
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://evaemlak.com/userfiles/file///30678342683.pdf In PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/22006641804.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/kevixululudi.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/v1ql7drk0tirmtrgaaqbn7jje2/gevagajerobinuwiderunilo.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/17007231742.pdfIn PDF document text
    • http://eternoohydro.com/d/files/96205558587.pdfIn PDF document text
    • http://dungcubepgiangtrinh.com/webroot/img/files/96559263025.pdfIn PDF document text
    • https://notrepanierbio.ch/userfiles/file/575660902.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/161255d4dc9dfb---pejaxotezakixazago.pdfIn PDF document text
    • http://manilag.com/FileData/ckfinder/files/20210826_702458A452E311B1.pdfIn PDF document text
    • http://limoride.net/gallery/file/zepukugivobe.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/22e48178d9af12fc4abc8d31f8e61d66/delokolunojuxawefitatabu.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/tizoropeg.pdfIn PDF document text
    • http://greenbrier101.com/userimages/28556006319.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/49334748313.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/wudiresototezived.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/40736946872.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160e00fbe8a23e---rakapevodoravamuv.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160941f82b82ec---73041288880.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/8959374c55ad36a664b865e58c32289b/vuviji.pdfIn PDF document text
    • http://cjatkinson.com/userimages/64703603715.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a610379c18e---4335035958.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/99076130697.pdfIn PDF document text
    • http://banning64reunion.com/clients/a/a7/a71e9339640f4be667ed55590a288245/File/bebesiviletezusamu.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16088ad0961348---62355174177.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=know+it+all+syndrome+psychologyPDF 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_off0000e1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E1 11152 bytes
SHA-256: 983fba5de83e8918dd4ed27677de5feb86c84a5452c7d5eed752778e2ae62221
font_02_sfnt_off000113a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A0 17592 bytes
SHA-256: 4ba859b9df196fe5c8668d010d61a8b85a12ff2eda7aac4ed72772211635baaf