Malicious PDF — malware analysis report

Static analysis result for SHA-256 862e747d054232c4…

MALICIOUS

PDF

77.9 KB Created: 2021-07-07 17:11:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 6c42f1d3a0c1e8b26bcf6c48ba027219 SHA-1: de249491440013811cb361e6711f22f5c52ec327 SHA-256: 862e747d054232c4c35ee2b442814dfdd0ea0d340c5477e4970f1f48b909983f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/rabexevevipevulu.pdf In PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608075577b82f---vironuvovipopowi.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f72113b2b9---xagopupiwiw.pdfIn PDF document text
    • http://farashimirooz.com/files/malefaragudodutoze.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/73841405395.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a95ebb0fdad---80957535201.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cdec199c6---jalijulosedovo.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606eec3528869---noboketigilevejara.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/ua0veh5qtb4ot5tpdiir8385e4/bozamiva.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/c1ae44f5184e486fa03c40de6cb52a3b/pifeba.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/xovakakutexivo.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/manebonipepaxutaparu.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/femagolororokaj.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/6137ce746e8b07fd6556827b5541fcfa/20192660015.pdfIn PDF document text
    • https://vongtaytramhuong.vn/upload/files/mugini.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/4f89dfac97754fa3d6b5f79e6539ab46/kumurekodozi.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3004922222---71018371417.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/reredozosuzuj.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/45096619513.pdfIn PDF document text
    • http://allycatering.com/userfiles/logotifivafijozufosunu.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/41bf14957cbd2877fa66c3d369cde771/gajaxara.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=dichotomous+variable+meaningPDF 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_off0000cbe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE400 10984 bytes
SHA-256: 0cde8c5be6aba8884f3c386218d241766a87c092eb62ce2e58dd62b270284da9
font_02_sfnt_off0000fd60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD60 17276 bytes
SHA-256: 1f755b3b7555442d479f5a5e445f55398d783a93778b898405383123c55de1f6

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