Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0bdb6feb3a639a…

MALICIOUS

PDF

80.9 KB Created: 2021-06-30 20:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 096da8214979230d6be1d50e43c13ade SHA-1: 75ca3305a28b7a1ca6ca9673c18998fabe18e2a5 SHA-256: 8e0bdb6feb3a639a3cdb6d129913302fa394e96aa75933a66b7f94db4d09f8b9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing or malware distribution campaign. It functions as a link farm, directing users to multiple compromised WordPress upload locations. These locations, in turn, host other PDF files, suggesting a multi-stage redirection or download process. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://cructi.ru/uplcv?utm_term=a+textbook+of+economic+theory+pdf PDF link annotation
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a191bb484c9---69447153545.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/zubutalejeb.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/3om4et77gkc0183o16bujvh67e/vejamagodolepo.pdfIn PDF document text
    • http://blbr365.com/userfiles/file/1621075673.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/e0d643959e5c418a2bf0647ff33e36e4/vixepotolevelimejopomi.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/bf28ec80a7ecebcffd833777d866f641/kafepetox.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/f1b875af20d0d1c98a861f903e684b54/nufinenuroxoviji.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b65aba67b---49419011754.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/8d6b735510d645f21fef270e5e87e075/tolenop.pdfIn PDF document text
    • http://proxima-design.cz/files/file/55879149145.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081963767f73---sesisusora.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/e21f751eb591872d2b389a0d379b8778/mosituv.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16074b72d13df6---62484498575.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3165c1b06---11044926708.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/4ceebb47b56933858137cf74b94d5959/50640293785.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/4hcpkg27lt20s4nvbcr108onn9/98531553128.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16072687b48efe---lazujenutifavineto.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/hb9c1626j43sor5n6akj85ocsj/94693722201.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607208a4a66b0---pokatamawuzomijopifeg.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/068e074edc31bd0d83099db04be88ccf/57701300179.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606dc3ca8434d---90808139950.pdfIn PDF document text
    • https://klairtransport.com/uploads/files/tubebasekoxuwuw.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dbba5812d---16105535363.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/aff1eb489a864540634f3aa128742b63/57513389864.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f33e7fc03---rixafon.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87D 10936 bytes
SHA-256: 9ee9f12d93770c82f6888287a715cf0f9c04933532eb0cc553fd86e63b2396e9
font_01_sfnt_off0000f172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF172 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10984 17072 bytes
SHA-256: 3aed632f9e70fd00bdba7641ff31b84f3ad36a1cda0390f79e69035b624d1af3

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