Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb4f360ae62c1905…

MALICIOUS

PDF

340.2 KB Created: 2021-09-03 21:22:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 025258c6d343dcad64f2121f11bf87d3 SHA-1: 51295f6702b7de19af3b8017184d3cfda0532c0d SHA-256: eb4f360ae62c190593d075c6f8aa2369686bc4a70e96b6470253fd5a1163f620
126 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 0.9379

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.
  • 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 https://cructi.ru/uplcv?utm_term=wika+s20+pressure+transmitter+manual PDF link annotation
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/dfcef3d589e9b00cd59bcb248da7e8e4/49477666254.pdfIn PDF document text
    • http://concilianavarra.com/userfiles/files/fugiwapedatok.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095d9fa59a32---14197366210.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/wesabitivuweterug.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa93d79cb5c---bogaxifejogebomudapajekim.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16085d1ed309bc---fagideleromu.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9d6a64ce3---91308309179.pdfIn PDF document text
    • http://kiko168.com/UploadFile/file/20210825082249399.pdfIn PDF document text
    • http://optykglowacki.pl/obrazki/files/97889084788.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/wozipizesig.pdfIn PDF document text
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/poxexiwarar.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/s6i18jelbi94t3pmo3g18rgqsp/nekugun.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/15e3l27abktfuockvv12c8v309/femomelarivoxanujad.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/petevefir.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/f2e46b99e89134299c9748d8d85e6a11/riguv.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/43135215725.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/91242871548.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/nonobimetixaz.pdfIn PDF document text
    • http://hotelbelleepoque.bg/userfiles/file/limid.pdfIn PDF document text
    • http://faisaltowel.com/survey/userfiles/files/21576528519.pdfIn PDF document text
    • http://odnoklassniki-files.ru/images/uploads/files/72737422854.pdfIn PDF document text
    • 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_off0004d6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D6E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0004eef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EEF6 22040 bytes
SHA-256: 937d6715596a21a64de671f8be0a359327212d34d1358a30a3e1f61eb0d4e1b9
font_02_sfnt_off0005285a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5285A 10720 bytes
SHA-256: 1d55e1abd38d7c761f5b0efe8fac7aa3aecbbeea97c55faa4b47106b6e60c5d1

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