Malicious PDF — malware analysis report

Static analysis result for SHA-256 882675250922979b…

MALICIOUS

PDF

79.0 KB Created: 2021-09-09 14:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 06c700d4e5d04b8c8bfdd2378d1fee70 SHA-1: d5422b126b28d8fbc8af4904cc908fb199e0f866 SHA-256: 882675250922979b335c309f17b466d75bc62e954ef59e9d25d530673c4c241d
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier indicate malicious intent, likely related to exploiting PDF vulnerabilities to redirect users. The presence of external URIs and link farms strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5930

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://garglob.ru/uplcv?utm_term=me+before+you+123movies PDF link annotation
    • http://jinyezi.cn/upload/bixojotisid.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613702ce8ea5a---2056362984.pdfIn PDF document text
    • http://pantipplaza.com/userfiles/file/bokixozepulusunamedusuw.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/zozavapulazap.pdfIn PDF document text
    • https://tranhdaquyhn.com/uploads/news_file/17090374930.pdfIn PDF document text
    • http://impactpluslearning.com/ckfinder/userfiles/files/sobakajujelafijiral.pdfIn PDF document text
    • http://kruengrangthai.com/files/files/13723429422.pdfIn PDF document text
    • http://onroerendgoedindex.nl/images/uploads/8502787942.pdfIn PDF document text
    • http://thewhitmerlawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/peporiwodatabanoda.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/nomikewitofodesifetose.pdfIn PDF document text
    • https://kaunas.cvzona.lt/resources/img/files/vazijogejabutamekareno.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/tejepije.pdfIn PDF document text
    • http://xinshifm.com/userfiles/file/rumusi.pdfIn PDF document text
    • https://elemonbg.com/Files/File/javexamotutovumopi.pdfIn PDF document text
    • https://andhimazhai.com/images/files/25207958789.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/539udb5cpn9qhmn474p2dnv24f/25286081970.pdfIn PDF document text
    • http://chiari-web.com/ckfinder/optimist/files/tegadug.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/miwipixuwatasidumaj.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/vivekisaji.pdfIn PDF document text
    • http://hermandadperdon.es/userfiles/file/mulavanu.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/a1429e6b55daeb8e69a4bda18f4e5e22/fowafituker.pdfIn PDF document text
    • http://basumati.com/app/webroot/ckfinder/userfiles/files/vazaxutadurojemu.pdfIn PDF document text
    • http://www.iuoelocal870.com/kaizen/ckfinder/userfiles/files/46086923504.pdfIn PDF document text
    • http://orderkai.com/uploads/files/pesizuIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D4 20672 bytes
SHA-256: d84523fd8fdadba3cbc3bc9b8ab21a53e1789aeb8c77ad2f1810344a2346919c

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