Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2ad72e4279ce34…

MALICIOUS

PDF

78.4 KB Created: 2021-09-05 04:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 09c6b0e053b1afcf4df0ba7cad6ee46f SHA-1: bca320aca0ffff5f3ee623a8fac1c0d94961e2b6 SHA-256: 2e2ad72e4279ce3432613ec180414786a335e78cc0d48fc2ec112980bd4d68dd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://vizesblokk.hu/files/file/4402832733.pdf In PDF document text
    • https://gjbuyerbroker.com/userfiles/file/30239968778.pdfIn PDF document text
    • https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/52652006900.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/kujabuxuzazefevat.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d096aee3f---16659239882.pdfIn PDF document text
    • http://shop-cartuning.pl/userfiles/file/romugowopanozomarixudowo.pdfIn PDF document text
    • http://bi-acaovo.com/upload/files/wesugige.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/b89ca336aba0f0711693b012786402eb/deditu.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///36542051912.pdfIn PDF document text
    • http://deltastal.ru/userfiles/file/sufodegawi.pdfIn PDF document text
    • http://baominhlabors.com/upload/files/37531945278.pdfIn PDF document text
    • http://biosystech.com/pdsFck/file/gototujegefosorigo.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608935a0c0e8b---vogawugexanudibisowepov.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a782c66158e---jimixubunabaxoxow.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/pigaketa.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4334b17e41---pufamojuvovirekol.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/tevinofowalezabes.pdfIn PDF document text
    • http://cuadepthanglong.com/images/ckeditor/files/situjetufomiwelurikave.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/77562725616.pdfIn PDF document text
    • http://techbis.pl/files/file/82058185726.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/g6php2tgsbnt9rbbp79f5mgbct/75719608546.pdfIn PDF document text
    • http://perechen-jurnalov.ru/js/ckfinder/userfiles/files/jokena.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc9d88955e5---68266492285.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e0511575431---rufipeke.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/38558440858.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bdbbcac5950---fijotat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=original+vedas+in+english+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_off0000cc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC19 18192 bytes
SHA-256: 04a01b935071914079cf8ff5fc0d2f352bcbbc43a05298916e6b42ccb8261f61
font_01_sfnt_off0000fb81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB81 10652 bytes
SHA-256: d0fb338b574f969d97b3d99a9e5a869accdf72d3254182e1c121b6a94b0614e2
font_02_sfnt_off000113a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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