Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a09053e54338c63…

MALICIOUS

PDF

78.0 KB Created: 2021-06-11 10:08:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e5388001a51ecc535bc9d51fb63b1554 SHA-1: 0d46b1af703d446ecc41af83cd36337c67b1d8ff SHA-256: 9a09053e54338c634637340c3d8931ec9dd811f7e547a5fb8cd0701af66eddfd
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 and an ML classifier as malicious, specifically as a phishing trojan. It contains a link farm directing to various domains, likely to lure users into downloading further malicious content or providing sensitive information. The presence of multiple external URIs and compromised CMS upload links indicates a distribution mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://philabc.ru/uplcv?utm_term=god+of+war+chains+of+olympus+ps5 PDF link annotation
    • http://cappellastudio.it/userfiles/files/xekuxoritud.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/20753369876.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d740449e2---xidukojulabevezixosowadi.pdfIn PDF document text
    • https://orrizon.ru/images/file/juleliler.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/533b1ff4d95f677259b9252426999ead/mokedugawubibetuz.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073ba7251f94---46096442729.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084612a0c1f6---xivetob.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/tnrjp4us7qf1tp65kp6ici16r7/vufubifovewelupinagoponop.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/vubune.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/14356623671.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/a9bd3008dd5e104a259e10987306f51c/2483399640.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/28433393910.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8f92a820c---26237756718.pdfIn PDF document text
    • http://ruilong-ironwork.com/CKEdit/upload/files/13682134842.pdfIn PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/muvodu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC9 5744 bytes
SHA-256: 8d628a3d921e552f2c4f4ef3400b27b69bfb50ae2de5bc3fb56755401f8c36fe
font_01_sfnt_off00010054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10054 12628 bytes
SHA-256: 77d842615409e06a770e93aad00cba93dd33425e9afc2b45736568cbbc720596

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