Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e11373cb84ce98…

MALICIOUS

PDF

84.6 KB Created: 2021-09-19 10:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9752fd9fa854b8191b216d3ab88904c5 SHA-1: 68763a9476b6d903b8976f8ae0c1e3a11a5f4197 SHA-256: e0e11373cb84ce988be98e30dc0bf9e48f3ec46f8128d1ec7b1d4b37138d320d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic confirm the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://smidgel.ru/uplcv?utm_term=how+do+i+send+my+location+on+android PDF link annotation
    • http://trunglam.vn/uploads/userfiles/file/99363290409.pdfIn PDF document text
    • http://vinczeandlaszlo.com/upload/gufuz.pdfIn PDF document text
    • http://fructusartis.com/i/File/jododikepak.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc7eed18ea---91025915563.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5e0f51901---vufonevowosetusik.pdfIn PDF document text
    • http://moretonassets.net/userfiles/zubujurapavagi.pdfIn PDF document text
    • http://sooam.com/files/fckeditor/file/11162290006139431a3e00e.pdfIn PDF document text
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/151239418785.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/50670953979.pdfIn PDF document text
    • http://www.dreamstoreonline.es/ckfinder/userfiles/files/migeralopiropixajudulo.pdfIn PDF document text
    • http://tfforming.ru/d/files/rinodopajunurame.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/jiwawizavekigemojexoved.pdfIn PDF document text
    • http://www.bordadoindustrial.com/ckfinder/userfiles/files/91876967265.pdfIn PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/xukofojumikiti.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16144bdc04f55f---84237109455.pdfIn PDF document text
    • http://sbcnepal.com/images/file/tenize.pdfIn PDF document text
    • http://jtylek.pl/Upload/file/desazukusaxipadofabew.pdfIn PDF document text
    • http://bilafafafa.com/shopadmin/upload/files/tajedodaworimesefajepiru.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/zobowusumomelafanag.pdfIn PDF document text
    • https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/wisunuf.pdfIn PDF document text
    • https://globalcircle.club/userfiles/file/25132498205.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/161413f2fe11f6---55122949951.pdfIn PDF document text
    • https://needlugs.com/userfiles/files/12139485223.pdfIn PDF document text
    • http://hooleihomes.com/cms_images/file/zejetekiwonodilajofexe.pdfIn PDF document text
    • http://modern-pro.ru/files/file/lebupifatufujogovu.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_off0000e441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE441 18168 bytes
SHA-256: e41a9ff0bf7c4f30a5050683155a3a659f5f7c22f57565c1fac42d47c9d0a473
font_01_sfnt_off0001138d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA4 10720 bytes
SHA-256: 0a58be028451e52ee55bfb7a241ff42134d861fed414581f34e93bd467c266a4

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