Malicious PDF — malware analysis report

Static analysis result for SHA-256 725b9857eb67704b…

MALICIOUS

PDF

99.5 KB Created: 2021-09-06 15:19:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 42414759ea3bb0fe8c1a2ccec9e13538 SHA-1: 7d76c888e360d82f594dd92057a40db29a0b3f95 SHA-256: 725b9857eb67704b4b6985e19c4f03fc3e1b04ad8741bf79bd6bfbe0bbe29cda
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to potentially compromised WordPress sites and other domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the structure and embedded URLs are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • 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.
  • 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 http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/k476p2ou61hkea299f2mt74rd4/rukaxajoxi.pdf In PDF document text
    • http://zrdb-drogbud.pl/Upload/file/tinenadepujidobasenena.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/45905355902.pdfIn PDF document text
    • https://myphambambi.com/webroot/img/files/20190054883.pdfIn PDF document text
    • http://congtyvima.com/images/Download/16556480696.pdfIn PDF document text
    • http://urotunisia.com/uploads/FCK_files/file/59558625798.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/vegikaloxomiz.pdfIn PDF document text
    • http://leguido.net/files/xiwaxerodopajenugusarekom.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b1085bd546a---86680346166.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16088e7db01453---tibukezupuve.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0f413e1ebe---nonafi.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070517a74fbd---dixafabazup.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd9f6fcfca2---newemototizoxuwejotori.pdfIn PDF document text
    • http://faulkfamilync.com/clients/c/cc/ccb94402b1eed20a0583117be0c0b506/File/74093453228.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16083b938ca1eb---58597972261.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1611b25644ad6a---dapunosebururisanipawiki.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f3d3e58b4cf---sujenofamivevanixudewa.pdfIn PDF document text
    • http://artgraf24.pl/userfiles/file/36532107734.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/a40e583a5222b77b54ef946501b665fe/14939738122.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/94e755114f18d6ab80e5dc36a5d41870/83948254024.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087429508abe---88261825856.pdfIn PDF document text
    • http://akhsmombasa.com/clients/861898/File/galaxa.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/jufokogepuwoxikurewep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=taux+de+mortalit%C3%A9+n%C3%A9onatale+dans+le+monde+pdfPDF link annotation
    • 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_off0001160f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1160F 10976 bytes
SHA-256: 56058cf95e4fb24942f0ad1a34c69b7cc8726595c1dce392409be0efe1a843a5
font_01_sfnt_off00012f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14749 21492 bytes
SHA-256: 1c38214c6b3dcb6b4ed6f5eb230923624b86c86e761da0f0c98c1eb6d44301c7

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