Malicious PDF — malware analysis report

Static analysis result for SHA-256 60efe92f0dfb342b…

MALICIOUS

PDF

86.7 KB Created: 2021-09-07 23:33:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b288b42a53a5dc9cf2189f3263063b83 SHA-1: 2e01bfaf05e87eba0f52eedd964e4a88a0daaa4a SHA-256: 60efe92f0dfb342b2a40e567beb09ab573643904dab43b68879ce09df807584b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs and is flagged as a link farm, with several pointing to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/b5c93f5faa23e6f4113f06e893d46e5a/35976316823.pdf In PDF document text
    • https://soudurelauziere.com/upload/editor/file/93647547346.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/gebunepagejewinuvubexeris.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/b822740819b786817d17df40f5431991/topadigedopexutiremafika.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/60714586569.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c32bc025172---61398181536.pdfIn PDF document text
    • http://easternsheep.by/app/upload/file/boxubajamexitu.pdfIn PDF document text
    • https://pharma-tools.pl/galeria/file/zorexilafuxizirenuxi.pdfIn PDF document text
    • https://e-uchebnici.com/img/file/95502404308.pdfIn PDF document text
    • https://oxfordjsr.com/userfiles/file/selaxoxomo.pdfIn PDF document text
    • http://studiocommercialedelpiano.it/userfiles/files/60993149906.pdfIn PDF document text
    • https://lawweb.info/mycms/admin/userfiles/file/12276480685.pdfIn PDF document text
    • https://ecohort.biz/userfiles/files/wexalejebobiw.pdfIn PDF document text
    • http://heaig.org/editor/ckfinder/userfiles/files/sonofurubo.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/tatuzaminu.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/34ed56a7cffe5f9a06c2252cd9270d01/39422334993.pdfIn PDF document text
    • http://blueyee.com/upload/file/240356115772.pdfIn PDF document text
    • https://castilloexterior.es/ckfinder/userfiles/files/gatemoba.pdfIn PDF document text
    • http://mitsubishilongbien.vn/images/ckeditor/files/13088023695.pdfIn PDF document text
    • http://ambvetbrashersclavoghisu.eu/userfiles/files/56729823297.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084495fd7763---lumigitibotexagubu.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/30545547328.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609681997a441---munikituxefe.pdfIn PDF document text
    • https://2acontractor.it/images/file/nataxoretubadaviga.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713bc28f8a1---63885998322.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=symphony+40+mozart+pdfPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/8bbb13d00c0c3f24da8ce2ec164e6cbc/fexabafad.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_off0000eb30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB30 10772 bytes
SHA-256: 0ad903b9e22c8ec4a8ab8c2b960804aac93f3ee6f8d7550e051235a10819e063
font_01_sfnt_off000103e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E1 18832 bytes
SHA-256: ae61354ae72e697273d113887e410a0059f492cd7dd31b4e541c07720e8f9c0a
font_02_sfnt_off00013556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13556 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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