Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0672d575fa86bcf…

MALICIOUS

PDF

85.5 KB Created: 2021-06-29 13:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aad4f890ecd13c54cfe396a6b8ad7a65 SHA-1: fb151b71d61d3965b6d8a8f7a26d131a9352db5e SHA-256: e0672d575fa86bcf39072ac06dbacd1f8995770b2e90f027a0b0ce2bd597ea5e
156 Risk Score

Malware Insights

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

The PDF contains numerous links to other PDF files hosted on compromised websites, identified as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest it's part of a larger attack chain, potentially initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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
  • 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://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/a035ae502eb12e55a83335ea60cb4297/saterademaselixopibep.pdf
    • https://parokisantolukas.org/Uploads/userfiles/files/86393543240.pdf
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/8jr7bmgd7cj4qjj5igdfdrih8b/90160699145.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160816d80053a2---8748122774.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796bd389c42---gevapevivabuvemuza.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/rotb1k8vrolptda3htou66i7g3/sidufilujixupotufulapuna.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16089fd88cff8b---44849631285.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/005dfa94802abb874ee3f1c6e960c045/ruvojimirazadiwow.pdf
    • https://binarbaidtrading.com/public_html/userfiles/file/zuvibubuva.pdf
    • http://studioriggio.it/userfiles/files/29090819703.pdf
    • https://eqonetech.com/upload/userfiles/files/lozatadis.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074277b46236---16361763537.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/50bbccda503e1693b0c650120658c21a/39324866546.pdf
    • http://msamerica.net/clients/873634/File/tobipuvuzerotegusot.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/ek2j56ar9d713coavu4umhnf2o/63972772745.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/cec1e030k3qbgujtkh8msukri6/fimuzekujora.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/8a932af9175d389ae017d2159a3c49b0/nuwonumezakufibowupitalis.pdf
    • https://cometsecurity.in/admin/userfiles/file/xaxufodowu.pdf
    • http://cp-1.ru/userfiles/files/53913031209.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a324ec7003d---35941443613.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082bf95dc547---75104621732.pdf
    • http://sakaryakasaplarodasi.org/userfiles/file/wazaxudazovemevemik.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c995bc1723e---69171178769.pdf
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160825bc43472b---zibatilonibewimagifa.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16095b9434d564---tixitaminob.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=past+simple+remember
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed06.bin
f57e0afa3bad292c8e855018aa335c94e4b260e1b6d3c5f948c86c1bcc8dab75		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED06 17196 bytes
font_01_sfnt_off000119a2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119A2 16792 bytes
font_02_sfnt_off000131b9.bin
44d88d7f9cc52b29368a79f3c115422a0669f34ff2fed934db941a74321e4708		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131B9 10328 bytes

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