Malicious PDF — malware analysis report

Static analysis result for SHA-256 1972b598aff2d015…

MALICIOUS

PDF

84.2 KB Created: 2021-09-04 19:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 07450fc67037762d80f192f5e9a6ae07 SHA-1: 52726d4b464252da01f3899031ad1d49c4d747e8 SHA-256: 1972b598aff2d01585941adf0552c9bc6e01befa639638209412f03633e0bc7d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nomylo.ru/uplcv?utm_term=used+to+grammar+exercise+pdf PDF link annotation
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d62079c0590---korafodexalovav.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/68535637561.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/fagurumidoxefozovoge.pdfIn PDF document text
    • https://stdtekstil.com/upload/ckfinder/files/wikazilizesuzabupovol.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/35889426981.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/90223083007.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/31571139583.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160ac86df4435c---87906107554.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/porozaxosofakagak.pdfIn PDF document text
    • http://cokhiminhhien.com/media/ftp/file/dedova.pdfIn PDF document text
    • http://lauraestetica.com/userfiles/files/xaparas.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3c1f37dd5---vijizibezag.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/22hs50j46e4i0kca75t3910820/nutixugobadepe.pdfIn PDF document text
    • http://netpost.vn/upload/userfiles/files/bafaduxor.pdfIn PDF document text
    • http://gingerbreadvillage.org/clients/e/e3/e396b250b60561adcb946853f9f62e29/File/xojedoki.pdfIn PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/47703662101.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/pagegipakafa.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/90573092694.pdfIn PDF document text
    • http://www.fred-robin.com/ckfinder/userfiles/files/sazupi.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a402c8b41c3---naguwokevirefij.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/pjqkn5kr3uiefcmpodfsen7op4/fekaxebadunobinizilex.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/3859de5fba7ee28e7aec7bccab410336/vugulemigopu.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/45f2f5705b33ade2cc017a76126c3e21/velurovirinosak.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b0da1f7fa.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_off0000e40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40D 17792 bytes
SHA-256: e199f9bb796e5df79ab51c1bfbacb5ea219574b6db2e4c83612b377b2ee9e6de
font_01_sfnt_off000111a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129BE 10920 bytes
SHA-256: defddacaf463493409dbf4bf33bddd0989e89a963fbe4254939b8ffa41385d78

Open this report in the interactive analyzer, or submit your own file for analysis.