Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed0035a0c267a926…

MALICIOUS

PDF

83.2 KB Created: 2021-09-08 06:00:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 0dad3a08161bd5dc44eed5787ef1a3e1 SHA-1: ac44632c9b35259f38ef53c470851c8882665e0b SHA-256: ed0035a0c267a92672001fc0fa474b01ee1d4782476bbb48a1cc4ca1cd5f8e55
156 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 0.9974

Heuristics 6

  • 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
  • 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://coretry.ru/uplcv?utm_term=redemptionis+sacramentum+pdf+download PDF link annotation
    • https://healthmatters.me/userfiles/file/9555121704.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/24851764221.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16083be43a6d46---zezetolezagevibemitux.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/87039663704.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b45cbf9ab8e---viragulofutarikodel.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/30443537778.pdfIn PDF document text
    • http://oceanstatevolleyball.org/clients/879495/File/javugizuta.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/891qfnrb48ss3j9bjjb74pgu54/dazasebexabeno.pdfIn PDF document text
    • http://sy-smile.com/upload/files/sogepe.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0429940234---bofatamupejibex.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/natur.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/wipitod.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/6858t1k08v4qd61gtn5rv3inm7/lovuxosaburitunew.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117b6ed6f30b---jowavegelofediboximiw.pdfIn PDF document text
    • http://www.dgtrans.co.th/login/ckfinder/userfiles/files/woludu.pdfIn PDF document text
    • http://poetryforthespirit.com/clients/872464/File/totosukekupisodev.pdfIn PDF document text
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/aeaa9e715daf0fcdefd5f5bf7777daa2/bozikewekabemozaz.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/5288419844.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/te38rohls11kav9dvh3vthoqmb/tubugokiretaripipu.pdfIn PDF document text
    • https://inverpalmas.com/aym_image/files/90281503268.pdfIn PDF document text
    • http://szkolaprzybranowo.pl/ckfinder/userfiles/files/30642589555.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1610794f20cb7a---18542466721.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/xodaj.pdfIn PDF document text
    • https://decoveinvestment.com/userfiles/file/62797905671.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_off0000d575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD575 21072 bytes
SHA-256: 1ac1f834d6a6f3bb44e588d060b33d4fd90b3e3ff01d69805abad4d3a96489a2
font_01_sfnt_off00010cce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCE 11012 bytes
SHA-256: 7ff8d73439b74edce7b7b0b4ecedd73e1e53c170541cf2f7afdb397de54db44f
font_02_sfnt_off00012676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12676 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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