Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a7b4ae999e286b2…

MALICIOUS

PDF

91.6 KB Created: 2021-07-30 12:59:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 66b5c4aa99243a2c7c58758ece0e9010 SHA-1: d46330ef8cbf02ff6438d60dffd32e3c5ccf3ea2 SHA-256: 1a7b4ae999e286b2ee9f9722078f0a55dc52fd24514824e64abcab3a3d573f3a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicative of a link farm designed to obscure malicious destinations. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The presence of external URIs and link farms suggests an attempt to lure users to malicious content, likely for phishing or malware distribution.

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 https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/622bdd3376b7ac5b9b014b8e7bde4cef/zewikiribajemitu.pdf In PDF document text
    • http://eventcompany.org/clients/e/e3/e30ef11cf4efe639fe6592aa37b9cb94/File/21992012182.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/6355c6aac9cee5d0faffbc157043a681/25956636814.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/73953146018.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/4139d317ffa5a43a15f52cd68b15f911/bazaboxologex.pdfIn PDF document text
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/jugamakalafelesufofatamov.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/be55a165ea901f481d0fa3a68e9cb997/88765206274.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/bd08e05173883608c2d44213fce85a30/26519310259.pdfIn PDF document text
    • http://mtcnx.com/upload/fckimagesfile/11940853529.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b5adfcc40fd---petupidavudivoneb.pdfIn PDF document text
    • http://velo.hu/UserFiles//file/buzalabidemetujoj.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a73581aa4---mirinuputuwelep.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c7413cecbf5---vefazadisogujikukile.pdfIn PDF document text
    • http://www.asslar.de/downloads/92092825062.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d4c501c68d3---75048397971.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf83c4b776---fipufedokolotaf.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/65693841063.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2134b57cf---xozitafefova.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/307b777a3dc3c8bb085179d02a67b2d7/kujon.pdfIn PDF document text
    • https://gym-rectif.fr/ckfinder/userfiles/files/31175295812.pdfIn PDF document text
    • http://drive4smilesontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/pufubefobikosewuso.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/84043784242.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608b48e1e4f94---gexevokizexonavoputikur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=autocad+kaydetmeden+kapand%C4%B1PDF 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_off0000fbce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCE 10604 bytes
SHA-256: ac8494943609daa05794378cf5c3ddfcde96dc7e5b6a77862ecb23dad0fc735f
font_01_sfnt_off00011415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11415 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C27 20212 bytes
SHA-256: 4aa002614a0012cb855af637c9ed354d4a7b2f46be37ece4678e5be92e27be22

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