Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ce40783deefdeca…

MALICIOUS

PDF

90.3 KB Created: 2021-08-14 23:14:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 9a86dba3be2c32dc4c120c332805ec9a SHA-1: 0078aa9db3b28df96a45adb8dc93597590bd8858 SHA-256: 2ce40783deefdeca5065f3af656ba77dfd9ae662aab91e8f44c0c05ee2442842
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 0.9990

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://littlefreddieking.com/clients/65037/File/bukuviru.pdf In PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722131b9049---146553437.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/95590694184.pdfIn PDF document text
    • http://stasta.com/userfiles/file/dajine.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/j387i8oc5vi84r2b30mlo3iin6/sigokonawitotunubix.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/45488666853.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/gejozeniduralokex.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/4i0tec6tp3lv6n3pn2hmvnk5io/21204808454.pdfIn PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/85137606801.pdfIn PDF document text
    • https://bjsteelvietnam.com/upload/fck/file/61715692879.pdfIn PDF document text
    • http://4bzsoftware.com/Images_upload/files/54105853853.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b2601e514---94027086624.pdfIn PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/31469644874.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/f45883675ba43c51b21257b99f5063f9/xobedimafamiperasum.pdfIn PDF document text
    • http://xn----7sbev0bhje.xn--p1ai/images/news/file/69891977894.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a55e8945ed3---jepewamewigadelowobazile.pdfIn PDF document text
    • http://winhazel.com/indigo/ckfinder/userfiles/files/muxeziwuxekimuta.pdfIn PDF document text
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/vu6dvr6mstvh4k158oe0n2ucgg/saxisegukigewisuwab.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021072816022675.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/a89710447a3e15b45628776ed2c82472/sukedovivebosixojo.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16080a0e508afe---17581995114.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=relacion+interespecifica+neutralismo+ejemplosPDF 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_off0000f9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A4 10916 bytes
SHA-256: 9d082ba0e3b93d84783a02e0f9442e1bd510c9f90aa2da1859dce4d012e3aacd
font_01_sfnt_off000112dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112DC 18000 bytes
SHA-256: fd7052ef8a5420014443f1f11f531c9b9e373db9cc4f2853b35b71dff31c9aaa
font_02_sfnt_off00013ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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