Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab0aea63affa1a9…

MALICIOUS

PDF

79.6 KB Created: 2021-09-06 02:29:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: fd20e722b03afee78cf556b771eec5af SHA-1: 3233eed08777d51ec1c9588d979cf1a487155ead SHA-256: 6ab0aea63affa1a9ec5f352bf63121bd68c1df2389e0c28a973cd6d1631561b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous links, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates an attempt to leverage SEO or compromised infrastructure for malicious redirection. No scripts were extracted, but the overall structure points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/plsqdc3pvskm4isi1j3udot5vj/68650060680.pdf In PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/97378398902.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/16861464535.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db55425acd---17077281197.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a73a4edc9d1---xarefeziterasuluxadopaz.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab24504d695---mavikovufiguw.pdfIn PDF document text
    • http://extrastyle.ee/ckfinder/userfiles/files/52703608218.pdfIn PDF document text
    • http://sochi-polyana.com/ckfinder/userfiles/files/xodubef.pdfIn PDF document text
    • http://dermatologomiguelgallego.com/miguel/fck/file/43656969091.pdfIn PDF document text
    • http://agriturismolescuderie.eu/userfiles/files/kewamosibu.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e4f24754c9c---sekuwoko.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/53406102474.pdfIn PDF document text
    • http://crystalcleanwindowsmn.com/clients/c/cc/cc5f591ab25ef7bbd7a205b431f39e57/File/vunejuroresigumemilumazo.pdfIn PDF document text
    • http://viquadro.com/userfiles/files/79331334468.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/31356795205.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/13126052171.pdfIn PDF document text
    • http://ligneus.hu/upload/file/kirurifuvurigegoji.pdfIn PDF document text
    • http://bracyfamilyreunion.com/clients/c/c2/c2db1a97f769835965582c74015c7782/File/samavomed.pdfIn PDF document text
    • http://kccmaul.com/files/files/xaragimosivemizone.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608654c6c8405---suleziwabiwikeguxolarojeg.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/7993436826.pdfIn PDF document text
    • http://hebakotb.net/userfiles/file/97570173759.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/lepawutojodinodax.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/a025dfaa9136304f92fd8960257a4217/salelumunozurojud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=identity+and+access+management+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_off0000d503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD503 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED15 16644 bytes
SHA-256: 4fb427ac2e9c809b6b20ea96d6ace3f842ee63ad8dda37b9c747b142ac55766a
font_02_sfnt_off00011839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11839 10764 bytes
SHA-256: 35557d1ca20f120522f405a492c653e4c434b670095faa615423c85e8594efdb

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