Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee8d9da3a89d8dd4…

MALICIOUS

PDF

146.2 KB Created: 2021-08-08 07:29:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: fb06c67540147178b543f773eb3e847d SHA-1: 41d87adbab8038762a2e6324de8d5efc224a7a71 SHA-256: ee8d9da3a89d8dd4619ea4e0cb25d4fa8f8688ff925ee18e8e22a211788240a0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm used for distributing malware or phishing content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this. No scripts were extracted, but the overall structure points to a malicious document intended to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6068

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://usaoxin.com/userfiles/2021-6/file/sojarutunusatoge.pdf In PDF document text
    • http://lapenya.cat/imgjovesnaves/file/49421487998.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/71631257736.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/93678678330.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcc0cb156b8---selapoxes.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/5968cf0b83aed3967837d600a9f23e49/68733407425.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/di2ivoq0rsjised5561o355i8b/73974225078.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///regovumamapolobebizef.pdfIn PDF document text
    • http://robbinsfamilyhealthcare.com/clients/2/2c/2c787fa606fc56c3a3a24dfc5409695f/File/54792855865.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/022c409d26c36754350d7a3dfa2911cf/5554786424.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/ed8e01cb97be60235cb14eef2ad02461/13899629122.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b6b4f2b22---xomonitulilajumexelotu.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f00d217332---87961047690.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160772054b088b---9293854314.pdfIn PDF document text
    • http://ibookingkr.com/FileData/ckfinder/files/20210802_5B079534962BB23F.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/jipisumesisaki.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/2411cc5a951e00d94b15320798fe2d78/24811679608.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/5f7952dbdcba4004a42e41877c31938d/63320292008.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f13d7e742---21798660905.pdfIn PDF document text
    • https://krone-murten.ch/userfiles/files/67521122851.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/708c0b52f815a58f6167a4155def1dfb/rodavidetofurisoli.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a6efbee553c---diterorawovafituguzukedaw.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cec76e74cb---tufukasijiredagalemesol.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16072d61d686b7---42788397285.pdfIn PDF document text
    • http://pickup-ws.com/userfiles/files/litojezewofina.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bd17b6daaac---13753257801.pdfIn PDF document text
    • http://www.jucadent.es/ckfinder/userfiles/files/15592823195.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=sinopsis+de+romeo+y+julietaPDF link annotation
    • 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_off000222df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x222DF 10972 bytes
SHA-256: 4852227765da4346e94c269e609870543edca73e3de7b72d3d3a461df54698b4

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