Malicious PDF — malware analysis report

Static analysis result for SHA-256 8be3e3e5c806ab7c…

MALICIOUS

PDF

88.3 KB Created: 2021-09-11 07:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 821ff45e051d475342b094678d9f9629 SHA-1: b6705f1c0c62dd5ece35be0856a827b74a96fc13 SHA-256: 8be3e3e5c806ab7cd88e33bf677374882100f2aebb3d85cd51b7c83e22b6f237
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript points to its use in executing malicious actions within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • 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://inwebjor.ru/uplcv?utm_term=how+to+watch+black+panther+full+movie PDF link annotation
    • http://geyikkimya.com/userfiles/upload/file/betedukunemolu.pdfIn PDF document text
    • http://aolisenjiancai.com/data/files/fakokujakaperudajo.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/rowekabujemagafirat.pdfIn PDF document text
    • http://marymo.ru/uploads/files/96688188927.pdfIn PDF document text
    • https://smartstone.ca/userfiles/files/19800308066.pdfIn PDF document text
    • http://www.gitialiganjlko.org/ckfinder/userfiles/files/1295047724.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/4186492863.pdfIn PDF document text
    • http://etepi.pt/js/ckfinder/userfiles/files/38379315264.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16133716691551---sutosusivog.pdfIn PDF document text
    • http://montpellier-businessplan.com/mbp/upload/images/images/upload/ckfinder/duwabudarivegab.pdfIn PDF document text
    • http://greece-ex.com/images/blog/file/jedigorexagila.pdfIn PDF document text
    • http://tabouligrill.com/ckfinder/userfiles/files/61059138352.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/kisebuwipebajujexuxa.pdfIn PDF document text
    • http://autoscuolapezzano.it/userfiles/files/32065100804.pdfIn PDF document text
    • http://vhktn.at/images/content/files/55065142338.pdfIn PDF document text
    • https://dispecom.com/cms_dispecom/sgi_userfiles/userfiles/files/timiliwujanikoger.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/bobilitipuwet.pdfIn PDF document text
    • http://murito.fr/ckfinder/userfiles/files/tupexazozujix.pdfIn PDF document text
    • http://buydecor.ru/uploads/files/73099409473.pdfIn PDF document text
    • http://objets.immoweiss.lu/userfiles/files/68995423019.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130fd671186c---52699937888.pdfIn PDF document text
    • http://amongelite.com/ci/userfiles/files/zavajemekenovorevinonumi.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/lubifixu.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_off0000f4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E7 11052 bytes
SHA-256: f5622d5e28b282cb237748699aceb876c9f1413e1ed8cfb217a32e92b95302cf
font_01_sfnt_off00010e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001264c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1264C 17596 bytes
SHA-256: c959f63edee97ad9e41c0a837da98706b7a9e8e75e7b8628cd2239047bd391ff

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