Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed8b34064476c54…

MALICIOUS

PDF

52.5 KB Created: 2021-09-04 09:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 01e1752cb8e3b7e8007b2d2daeee9bb7 SHA-1: 56c70e1253111548832c195aaf18e224b3001998 SHA-256: eed8b34064476c54736cad6cae00876b3e75ed09ad29aa97bff9f0d7016a91e6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm to distribute phishing content or further malware. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a deliberate effort to use compromised infrastructure for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8748

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://wastran.ru/uplcv?utm_term=maine+driver%27s+manual+answers PDF link annotation
    • https://kalyna.ua/sites/default/files/userfiles/file/60894524606.pdfIn PDF document text
    • http://www.nagsa.es/ckfinder/userfiles/files/nokilaxobag.pdfIn PDF document text
    • http://pattarasawat.com/ckfinder/userfiles/files/36717489584.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba49d55aca3---sozaza.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f68262f23---88826034775.pdfIn PDF document text
    • http://carrozzeriardue.it/userfiles/files/29439229425.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/mojimexomozotafanene.pdfIn PDF document text
    • http://nordicaluminium.ru/userfiles/file/76789640179.pdfIn PDF document text
    • https://kebecelectrique.com/upload/editor/file/xinuranusilaror.pdfIn PDF document text
    • https://efckrakow.pl/userfiles/file/wojukenumi.pdfIn PDF document text
    • http://tvsatkrosno.pl/userfiles/file/57825030828.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/8480252836.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/22721334865.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c747150114---22943437781.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/dejewidas.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/tesojunodirivenedupupam.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cf3d11bf7---mimixanepalorozojuxi.pdfIn PDF document text
    • https://kungfuclasshongkong.com/louis/taichi/ckfinder/userfiles/files/60664057671.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/960a018bf42f634ae1ec95195a062a7d/gafazu.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/48131628430.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/soxuxubitopumave.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c17bfbe3a3a---gorupagavirejabedozef.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/a88ffccb732fb53a2396897cacf7453d/zumezub.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/f0257c066cd2ef91b3569abe619563ff/67551097665.pdfIn 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_off0000b73a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB73A 10472 bytes
SHA-256: 0d8ed802e84ee6be3fb12932fcca011b5ccaefbcfb1e0ab129bfcfd62e214737

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