Malicious PDF — malware analysis report

Static analysis result for SHA-256 036710d508edcb90…

MALICIOUS

PDF

80.0 KB Created: 2021-07-15 10:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 578f3fdad9b9fa001f5e2461a6e984c8 SHA-1: deaf9144c3ba1a3d1aaa2393e6058eece91e4c41 SHA-256: 036710d508edcb90bb4eacd448293785c38c546f837c498dc8bc09af84e62257
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable domains. This structure is indicative of a phishing or malware distribution campaign, aiming to lure users to malicious content. ClamAV detection further supports its malicious classification.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4210

Heuristics 5

  • 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
  • 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://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16079524fa1735---jilajimexitoxejudotusipu.pdf In PDF document text
    • https://krassimirtaskov.com/userfiles/files/50830197090.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/28575101254.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/96025841344.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074a5d19438a---13006936909.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/4a79592e6b9ed4dc52acb2a02d3f8726/88762789736.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/suvomizelalorawife.pdfIn PDF document text
    • https://rent-1.es/ckfinder/userfiles/files/30628636586.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8ca3e14c8---32348161293.pdfIn PDF document text
    • http://westleyden72reunion.com/clients/4/46/469dc9162705cbff2d1fbe132f144f37/File/zakam.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b1f6147fc---13052830552.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/1f56e81715049340578c6ccd70a13590/26899452101.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/pozuzalifuzikake.pdfIn PDF document text
    • http://hanleyresources.com/images/40400317260.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/m9n4ak2v8fcctjor574qb97cp4/zuzelete.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/hmq3u0j3fenfkkhu78r9usvel3/10166595097.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4839ed502---fozinat.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/10905948822.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/welexoxosamibob.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/d1cb8ec3223a715e0256df59f79bd780/vezedodubepisikawox.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/44047565150.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7bba260c1---19798234916.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/15555480158.pdfIn PDF document text
    • http://susasoft.com/upload/userfiles/files/52969750364.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=system+software+and+hardwarePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF424 10756 bytes
SHA-256: 8389710026826d275dafaa15edcaca6de7a626c44d86d9800dd09d2f94a43fc1
font_01_sfnt_off00010cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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