Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f38eaa3414c18a0…

MALICIOUS

PDF

90.1 KB Created: 2021-09-05 03:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d46fe83ddb4c862f068371e3b68ca628 SHA-1: f073737fa0487a4d46e4a583fdd68b3eb2c1531e SHA-256: 2f38eaa3414c18a0932dd4c2b455a45c0b5de0f1db5b7020715c539c74616006
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://garglob.ru/uplcv?utm_term=compress+pdf+maksimal+500kb PDF link annotation
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca214cd22e---fovepukoxelum.pdfIn PDF document text
    • https://bczenekar.hu/files/file/94255117239.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/visopalelazejijifanuru.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/903296f6b40c6d7dea28cba01cbc9cf4/55980129747.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e998d2a012---ligamekapevonida.pdfIn PDF document text
    • http://boldogelet.hu/media/41198846458.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cf879f2e4b9---fevegusaviwuganu.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/16081139ac67b2---dotumojewobivonu.pdfIn PDF document text
    • http://northphoenixmustangs66.com/clients/4/4b/4b49b54eec06ebba3741256e9f3e6f2b/File/18988654725.pdfIn PDF document text
    • https://zmiz.hr/userfiles/file/xubij.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/vejonirelozuge.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ea1d75163---vefufirul.pdfIn PDF document text
    • http://web68s.com/upload/files/watamaropusavojalaw.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/vikexukipifafodo.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/o7aecufarei7h9u474hvds40kt/xugafemebasinemudegini.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d23dc073334---19505907817.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/kepivewomik.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f036a8afc---tosaw.pdfIn PDF document text
    • http://yearbookplus.com/uploads/ckfinder/files/xotubasibojabibobiti.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/44ef5390568812d90ecc0c1e331ff28e/92985769798.pdfIn PDF document text
    • http://healingtown.org/userData/board/file/50630844774.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_off0000f845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF845 10976 bytes
SHA-256: bc97bca6210ecbafff2d8b897526e369156e338e7558d7de010214ec61517297
font_01_sfnt_off00011189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11189 18836 bytes
SHA-256: 83ad2d884644c14b88ae725044fd59c799c18e1c46ee142e6406a8fba2bbdc24
font_02_sfnt_off0001428a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1428A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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