Malicious PDF — malware analysis report

Static analysis result for SHA-256 6063a93c367a7a91…

MALICIOUS

PDF

84.5 KB Created: 2021-09-18 23:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f643a9a41c3d0ee016ba68ae95054a0a SHA-1: c0c35db05d9f2de315e5fe5562832575251c892c SHA-256: 6063a93c367a7a91fd35d4e3f331f3a2676d570ed9204029068ab5bc6b4a903d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains embedded JavaScript and numerous URLs that form a link farm, likely intended to redirect users to phishing sites or download further malware. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://infrive.ru/uplcv?utm_term=wonder+woman+1984+full+movie+online+free+123movies PDF link annotation
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16132c221bcc5b---40765411468.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/90584994748.pdfIn PDF document text
    • http://holdemigny.fr/ckfinder/userfiles/files/borosaj.pdfIn PDF document text
    • https://gujaratisamajparis.org/upload/files/62436071928.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613f05946db6c---24895854905.pdfIn PDF document text
    • http://mis.nrru.ac.th/gradjournal/ckfinder/userfiles/files/28432238296.pdfIn PDF document text
    • http://myphamasia.net/upload/files/robopa.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614481f06e892---semunovogo.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/walokugurumuliderowitopix.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613616e950a71---ziler.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/63649280411.pdfIn PDF document text
    • https://mercerapparelss.com/userfiles/files/pivaz.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/23481315966.pdfIn PDF document text
    • http://geoman.cz/data/file/11536636668.pdfIn PDF document text
    • http://methese.com/upload/files/84655152952.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134fb8b45fc7---77545673550.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/57c9ff1f0c950b97971a66c88765196f/57444754531.pdfIn PDF document text
    • https://vinacomvietnam.vn/uploads/news_file/fakezolalabovi.pdfIn PDF document text
    • http://skupka54.ru/upload/m/rejokofenijo.pdfIn PDF document text
    • http://www.aaar.cat/assets/js/ckfinder/userfiles/files/tewaxobilimiturik.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/zejodonoleverobowefejuwiz.pdfIn PDF document text
    • http://gvs-russia.ru/admin/ckfinder/userfiles/files/2134763921.pdfIn PDF document text
    • http://t-cso.com/upload/file_folder/file/55900525392.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/5a65273e967c970f29ef62aa213d5772/sozivakeko.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_off0000e29c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29C 11460 bytes
SHA-256: a258c71d056ce9ff572fe57105a86e151bd548c60960cb8dafffeb625b769cd4
font_01_sfnt_off0000fde6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE6 17920 bytes
SHA-256: 9628f964f78808d460ded3dd2a465b0f038ca7efec61aafebc3508ae66472c80
font_02_sfnt_off00012c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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