Malicious PDF — malware analysis report

Static analysis result for SHA-256 aedec4dd507a0d1d…

MALICIOUS

PDF

80.4 KB Created: 2021-08-02 03:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 348743c6b915596be6e65e9b799b6231 SHA-1: d3cf186b764c1f3de2a9d88813af15ccf57210d0 SHA-256: aedec4dd507a0d1dee94d303b51b1236eb8f403939f7d35117311d50daff96be
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links, many of which point to compromised WordPress upload directories, suggesting a link farm designed to host malicious content. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6637

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://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829fc5404d0---64658514655.pdf In PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160c85e554af45---52477638009.pdfIn PDF document text
    • https://invest.pl/userfiles/file/84070470773.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/dvf7h4rguili30ovl292nea3ea/gosimepazusadina.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7836eb91a---11478885794.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e90a2b5725---parobodoxizedurel.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/13864660914.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/25642287632.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021062407172773499.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/808592903.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/93078105173.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/sikizajuxapezufa.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/20844011030.pdfIn PDF document text
    • https://ashleymongolia.mn/uploads/files/vinuwiwipozadivuw.pdfIn PDF document text
    • http://chronicles.ae/userfiles/files/detedudagulog.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1609d00506be79---takodepaxufifuforisuv.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/solavutimelox.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/46069025536.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d2038b060---85555783488.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0471511001619964698.pdfIn PDF document text
    • https://eventspicer.com/ckfinder/userfiles/files/57475243734.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/pejowenomakemafe.pdfIn PDF document text
    • http://indovinandoilmondo.it/themes/userfiles//files/99549733453.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/15aa4764f8d50b02319f0b8d1ce180e3/winukaxapeda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=could%27ve+should%27ve+would%27ve+songPDF 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_off0000f568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF568 17268 bytes
SHA-256: 490ac5506d581c02bd1a6db4efd28b1b54d2548e26b8a8340de1e6d9111435b4
font_01_sfnt_off00012295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12295 10392 bytes
SHA-256: 0d0606feb1ef860669f15fa92bb72b323e665eb105eff338a7cf27529396c5fa

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