Malicious PDF — malware analysis report

Static analysis result for SHA-256 e095fd3b85220a2b…

MALICIOUS

PDF

88.0 KB Created: 2021-09-06 05:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2f911ae46ec319878f362b7ed0cfe795 SHA-1: 47d4a6f833dc5113f617dc8900b4c122de7e7740 SHA-256: e095fd3b85220a2b46f99ebe60680bea43920a32ce9843219bd5b9f48cdd1ca8
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution document. It contains numerous links pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF structure and embedded links are indicative of a link farm used to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e9bdd14ac---72470642055.pdf In PDF document text
    • https://jokerprod.net/userfiles/file/63291219925.pdfIn PDF document text
    • http://colescastle.com/clients/875019/File/fikudupopomofuridepopak.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/tapafasipezana.pdfIn PDF document text
    • http://smit-electronic.hr/upload/datoteke/51619108038.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/d6ebe89619a86e5334d276b7ed719431/risofukimi.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb65993d1e---14682086037.pdfIn PDF document text
    • http://szpk.hu/_user/file/kafalira.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b9333ebde---42462236052.pdfIn PDF document text
    • http://www.eurosecurimed.com/ckfinder/userfiles/files/99626091943.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/24332619110.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/f75af5193ebe436d32840376c41eeccb/80671814505.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/108c2497934a789d7382c8f4b6ed7183/bofumunidaw.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c8f303eca---42192758648.pdfIn PDF document text
    • http://kavernoklub.com/campannas/file/33188744591.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/lovewu.pdfIn PDF document text
    • http://djk-winkel.de/images/uploads/file/37915609666.pdfIn PDF document text
    • http://koreaseowon.com/ckupload/files/54552678995.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/zupejexezoz.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/os5k25aqoeam1uqbhfblu12b8l/vejusepasenaz.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/78554087654.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/wirusafagupasutuvome.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/vebikazakitalas.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/7466878364.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/7a0d5633a7daed205f845f908b487dc5/26057971590.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=ishiguro+remains+of+the+day+pdfPDF link annotation
    • 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_off0000f121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF121 11064 bytes
SHA-256: c797292e42110be48600b15c3960b1c59373527989268a3bca7e55cc17778ed3
font_01_sfnt_off00010a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8A 18776 bytes
SHA-256: 8148d92d28c2643fa2e7da4ea97927fb62a9924a1e77f8457a3f1379367fc5cd
font_02_sfnt_off00013ab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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