Malicious PDF — malware analysis report

Static analysis result for SHA-256 746e49d015760652…

MALICIOUS

PDF

63.8 KB Created: 2021-09-07 04:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 79714b30bebc372fa8d2d688a0570b4a SHA-1: 2e766769b926a72cb4eb7811b36dd5b94be5774c SHA-256: 746e49d015760652f837feb4393d82141258d10b1d594c95abcf5fd6a835a943
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable domains, indicating a link farm or phishing campaign. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the nature of the links and the PDF structure align with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7446

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 https://crewmak.ru/uplcv?utm_term=manual+de+calidad+iso+14001 PDF link annotation
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/fb2b01dfe88c14071e112cee7759377a/butezutikajalodulebavit.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5b7b6d16c928fdd71566cc8541066d58/fonugilokarorerivus.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/8c30a0f5770fb28ff4ad610ddc62175e/poguxaliz.pdfIn PDF document text
    • http://qqsbg.net/uploads/file/85728344866.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210810_03045ECF91BEBFF6.pdfIn PDF document text
    • http://startent.ru/SITE/files/editor/file/ravuridobo.pdfIn PDF document text
    • http://vintageguitar.ru/ckfinder/userfiles/files/videwaneles.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613574bab06ac---92976000673.pdfIn PDF document text
    • https://najarshi.com/basefile/najarshicom/files/30321828181.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9846378a1---27448397512.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/f92b13773b3f51e5cde80e49f524888d/27940809256.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/47451630749.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c25c5b6643---depavawigoliduvakunew.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/61aea43e4681d4c1c88ca13f79efbd3f/2902095036.pdfIn PDF document text
    • https://at1-turbo-j3t.com/contents//files/sikeziwikudobovedilubo.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/ruvigolenofoxi.pdfIn PDF document text
    • http://dalaichau.com/files/laresasirimisenepa.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9abb58d96d---dotagudozebanalesizuj.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/13963942873.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/f6a6c322caf08178af614f97fbad7541/82642727396.pdfIn PDF document text
    • http://thibangoto.com/app/webroot/uploads/files/61103457558.pdfIn PDF document text
    • https://hanahana.vn/media/ftp/file/52594762887.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/93447255088.pdfIn PDF document text
    • 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_off0000c589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC589 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9B 16028 bytes
SHA-256: 92868a42e29f09e079057c9e14490f0d5f48fe778234d55527cdb3def05444e7

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