Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dca3eab096aca4d…

MALICIOUS

PDF

75.0 KB Created: 2021-09-07 04:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a7566e851c04e44739769ac075ccd7e7 SHA-1: 292415bafb606947c0fd684d8325781c5478fb78 SHA-256: 2dca3eab096aca4ddee849f3d777304ce56a25048ef288f0a355747a47f8102b
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the structure and URL analysis point to a link farm designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094dbc57a63f---37316524236.pdf In PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/ofbv28pcumpokko6fsbvfgc8lf/4837805903.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/20c00134549f23b9acba846a04f6ab9d/58528224561.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/33785851594.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d03b9a6394f---56876310093.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/22135488442.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e2963c7c4---weduzomiwanukudupulobelo.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/duzewulekabagudonew.pdfIn PDF document text
    • http://www.yankey.com.tw/demo/public/editor/ckfinder/upload/user_upload/files/91839573583.pdfIn PDF document text
    • http://barcelonahotel.vn/UpLoadFile/file/49783039078.pdfIn PDF document text
    • https://eitmedu.in/ckfinder/userfiles/files/pezozitufowijaxejixo.pdfIn PDF document text
    • https://cristalensi.com/public/File/15928842402.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7cd54b3ff---50417206357.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/17934824401.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/emo9r311krj2mm33u4a2aph2gi/97855256290.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/67bf48d3adc8b7385fd82f944acc1d3f/nibiwajezixeboxat.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9bd7b17ac---12997707072.pdfIn PDF document text
    • http://zzliuxue.com/upfile/file///sovewakive.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/miwezokubaxewozanuked.pdfIn PDF document text
    • https://bbdirect.com/ckfinder/userfiles/files/mukenenopokizad.pdfIn PDF document text
    • https://tadimtursu.com/image/files/46590077809.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/u2rnn1nl9q7b6gi4fs614b5lu5/12915658930.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16119dcf2aab2c---jolaxudumipas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=html2canvas+pdfmake+angularjsPDF 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_off0000baab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAAB 18236 bytes
SHA-256: f8415f40e09585a5986a406144fc21ed4bc5465bd74d5aa968dce150d7c945a5
font_01_sfnt_off0000ea7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7F 11248 bytes
SHA-256: 522802175c3da81b0191acc8c3b1b945bac8f9d705f46acff7bbb400b3dfa267
font_02_sfnt_off000104c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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