Malicious PDF — malware analysis report

Static analysis result for SHA-256 7602cba5df194c64…

MALICIOUS

PDF

91.4 KB Created: 2021-08-13 06:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b0bb037916b92e34d4913fed421f44fa SHA-1: 056765e8e6e44baf01a338d05fc2c19e0ebfca7c SHA-256: 7602cba5df194c6498325395fd9b3fa449a1a4e948085222fede2820b2c8e4d8
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics indicates a likely phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://exantusfamilyreunion.com/clients/9/96/968554593547eb574606130639276270/File/95077637550.pdf In PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/jibolirezevuzabexewotike.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160941fdc77b7b---15993041794.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/8a201882eb857a8641ac2d672e297753/2937395639.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a851d05f5c3---76345048797.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/magoxuvinu.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b63c52b4306---fixigijulo.pdfIn PDF document text
    • https://sonerofset.com/userfiles/file/99592903460.pdfIn PDF document text
    • http://lucchetta.net/userfiles/files/jobibopuzoxasonewomejagep.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/0ed3a072a71dd8c77e0cdbd61aa9dfb5/gusol.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/66827591524.pdfIn PDF document text
    • https://mfdesign.hu/files/file/36830786856.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/29194619290.pdfIn PDF document text
    • https://serini-cloud.pl/uploads/editor/file/52108067095.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/lawedixef.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/74957515812.pdfIn PDF document text
    • https://nakatarikaszel.pl/app/webroot/userfiles/file/84889254865.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609900cb2f89b---36930451973.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bc443f938---bevigo.pdfIn PDF document text
    • https://nepalaviationmuseum.com/userfiles/files/49211503010.pdfIn PDF document text
    • http://52fotki.ru/ckfinder/userfiles/files/52230988739.pdfIn PDF document text
    • http://semangkabiji.com/contents//files/jukolopezewuzonov.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/m1k4bkdgah4qtjflc1q4klhhld/jibozufagarojuzavekad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=ava+comunica%C3%A7%C3%A3o+e+express%C3%A3o+unip+2020PDF 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_off0000fd10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11527 11348 bytes
SHA-256: e8023b4c81e38dd79054be96197c52fe3127922e058dd3eeb4b188f8832ecca6
font_02_sfnt_off00012f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F30 18704 bytes
SHA-256: 0351658be484c3e0b421a16351661e47fe2b696953872eb1067c7af6fe3972f3

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