Malicious PDF — malware analysis report

Static analysis result for SHA-256 14bc59db396569ad…

MALICIOUS

PDF

74.4 KB Created: 2021-09-16 08:19:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9694db04d51903400ab59e0c0d9882c9 SHA-1: 1fba4da7e9175c9f18ce7f32f64ad6e54b1dd7c1 SHA-256: 14bc59db396569adc1decf22027f5cb04ec801d2d68237112de9a4523bf051f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on disposable domains or compromised WordPress installations, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://huntic.ru/uplcv?utm_term=daily+star+online+newspaper+bangladesh PDF link annotation
    • http://topbondtape.com/uploadss/file/46075897056.pdfIn PDF document text
    • http://52963566.com/upload/file/202109101100203085.pdfIn PDF document text
    • http://cichanski.com/Upload/file/votubimo.pdfIn PDF document text
    • http://azseal.net/uploads/userfiles/file/toxax.pdfIn PDF document text
    • http://cameradungphat.com/uploads/files/sowonuxumexogogekefamex.pdfIn PDF document text
    • http://archiprojektai.lt/app/webroot/uploads/userfiles/files/lubivufo.pdfIn PDF document text
    • http://maybomnuocdanang.com/uploads/image/files/87362708685.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a01efd7a02---tarufivopibatunuz.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16139608363ae1---76449664305.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/1l04mme5od179kajl346g1bgl2/dupuxiw.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e610958b27---kesumijefuzumo.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613504501a9a4---zaxerosowananekavarirugef.pdfIn PDF document text
    • https://xistenze.nagydavid.com/files/files/24339782321.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/59ae2d43a2f5eae8de4b06968da8a1cb/lamugijegarizuf.pdfIn PDF document text
    • http://fpempresa.cen.es/userfiles/files/gimeser.pdfIn PDF document text
    • http://mvsexpo.ru/admin/ckfinder/userfiles/files/lisaxud.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/54bda8cb3d6287ce508b78288812d8d3/nupafujo.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/vunovexodejokux.pdfIn PDF document text
    • https://dichvuketoansg.com/luutru/files/9172502107.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/7836156081.pdfIn PDF document text
    • https://ripedzn.com/app/webroot/files/fckeditor/file/95977210857.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_off0000c07e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC07E 11012 bytes
SHA-256: 0f42c5db9248c5d898027b473831bf78c7b18817865c6f6a36c731eb431b1cf7
font_01_sfnt_off0000d9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B9 16460 bytes
SHA-256: ea1164d181b025519cd7a1375a490c03550173963a87a45089aa43983a02a8c8