Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b363111341a6e0d…

MALICIOUS

PDF

112.4 KB Created: 2021-07-01 21:44:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cf6a7e57e23a2d9f013aa67d9404aafc SHA-1: b3dacd100a1789ccffe09a1edff7005a4f9c2761 SHA-256: 2b363111341a6e0dc10f608295f232fda41daa46f0d5023f9d04a9bb4f236727
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, indicating a high likelihood of malicious intent. It contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure strongly suggest it's designed to redirect users to malicious content.

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://infrive.ru/uplcv?utm_term=transgenic+plants+and+their+applications+pdf PDF link annotation
    • http://narcisse.sk/editor_uploads/files/4316548980.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/kemanadepamuru.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/3ql73oj81rdqvjlhpgu8k2ictv/13013705635.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/73e126f99e1845f6ebc94a0f293da145/83261087769.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609620c5da3bb---movenisifokumas.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/55251707586.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/ae39974757b6fddc178a816360460149/53574713083.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/st2k2bbk5fgd980m7gi3pbo8f7/nidunega.pdfIn PDF document text
    • http://drive4smilesquebec.ca/clients/f/f5/f58105ca183540932673f5bf18e62671/File/60264727517.pdfIn PDF document text
    • http://alptw.com/images/files/titixogofu.pdfIn PDF document text
    • http://pronobile.de/catalog/file/62632743375.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3666d90f21c7718a0f4dd51044d7a8b5/wigadurexugizigibewox.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/bd5004c6bc2e51fa7ae5d07186474b45/zaxabameruxe.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/ed7a62ba3b10358f1971f569f781e0b7/sulafebiwopaxegaxepafe.pdfIn PDF document text
    • http://pmteventures.com/clients/5/57/576e8e71b788aac95a268099fab76a3d/File/37490218691.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c2844ce8681---14089143206.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5134bcca6---nuziboriranugovopadadu.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/sovizotizadilekasukunu.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/87414346111.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/51644631755.pdfIn PDF document text
    • http://yer-krasnodar.ru/ckfinder/userfiles/files/97714927629.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160736adc805d8---rovezumamet.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/jumafirewilovajisagazot.pdfIn PDF document text
    • 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_off000152f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152F9 18456 bytes
SHA-256: 13e6a23fc681909d39e5026e58fcdbf4a1b119e1c73d1224db468767bf284445
font_01_sfnt_off00018332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18332 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00019b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B49 10864 bytes
SHA-256: d16d4abc21625eaa64ab7e81b7e443b1be0cd489661eda24bac10b501cdfcdcd

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