Malicious PDF — malware analysis report

Static analysis result for SHA-256 669d1319a3b3fb34…

MALICIOUS

PDF

67.9 KB Created: 2021-06-17 09:17:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 990aa7f168b2692d17745cbfde247bbb SHA-1: d12c6a65464e34c0e5ef15459a1a60d7932d4a52 SHA-256: 669d1319a3b3fb34ed76cd7d63689d350edbdec4434c37b55365779eb2bb4ae1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the presence of embedded URLs and the overall structure point to a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8569

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://inwebjor.ru/uplcv?utm_term=sal%25C3%25B2+full+movie+watch+online+free PDF link annotation
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/nu5l261hbndsdreh5a0mvcej7b/53883422502.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/decbc31b6dece551f90b965a43d1bcb8/1518884378.pdfIn PDF document text
    • http://asahiru-ban.com/files/files/98489504001.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0a96d10ad---71812580753.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/kudukufidigu.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607a77e131a4a---gofeferufana.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b09de5c91cc---nudenabepeda.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/3au6p0lv3budv9hrrktqrt8rv1/45101057320.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/20969459372.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/tekubomulutolala.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/bfc3bb50f9861afc71f52c5adf84b99f/kinanudamuzorurevegotis.pdfIn PDF document text
    • https://ka-base.no/images_content/file/kasifejebolabapo.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/611255a48e78fb51bc6b5259a41bb5fb/sawebizuweraw.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/96ad98b38d4f091fa5fb4c047d5786f4/38379100504.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/afa427235b7616deab9d109fc541050d/visiramaferovibivefafino.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/bawopibod.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608484c2b26b0---gumobapu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD2 5332 bytes
SHA-256: 5642638b5896cdfff53e1421d3fad6949f3a88f3750d8eb5b9faa54546b669c5
font_01_sfnt_off0000eca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA7 10736 bytes
SHA-256: 6ec790f7d13d9f8bfb196bf4533da061cbf61765d2b4fd548694e19bdbe29ce8

Open this report in the interactive analyzer, or submit your own file for analysis.