Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bffd696fb02840d…

MALICIOUS

PDF

86.1 KB Created: 2021-06-25 12:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: c531aa771d95b82d466d453d25aa6ac5 SHA-1: 2de1247a2fff558b1680eaabb6250e1b61c7d427 SHA-256: 0bffd696fb02840d235e502a0a5678fa6a69ab94dc0383c6525b442acfcc4bba
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to websites that appear to be compromised or used for hosting malicious content. Heuristics indicate it functions as a link farm, with some links leading to compromised WordPress uploads. ClamAV and ML classifiers also flagged this PDF as malicious, suggesting a phishing or trojan distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://autoandtruckrepair.net/nbloom/fckuploads/file/35151076223.pdf In PDF document text
    • http://cintabogor.com/Uploads/userfiles/files/popusojozitujonazeno.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d4c99fa7e---vevudukirufepijoginivof.pdfIn PDF document text
    • http://cf-solutions.org/app/webroot/fckeditor/editor/filemanager/connectors/php/imgmedia/96906000506.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/15071300787.pdfIn PDF document text
    • https://nestaerospace.com/uploads/file/saduj.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ad7f19a56---69386649793.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160879e1cdfceb---suzefagekibeked.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/rdu96alkudn0b5pn38veqtahgk/mexadigiboxekowi.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202104290505078160.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/a0fc265d3f6797229c53556d9f1a2859/9106318623.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/77549768632.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/9307fd468b41e29daa5a13a429aae031/ledobalatofafuxerini.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/viritaziferewikogafukazak.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/b0882eoisbok55iegqeo9pga9k/74461010147.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/3d879202b2fe631f8cb60232f38c81b9/vowurevarutapesivalame.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/37570405317.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=shiny+legendary+stardust+costPDF 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_off0000ec7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7B 10940 bytes
SHA-256: d9630150777b6a738d62647e9b0a93268c0f2dcbba3423ec87b3eed9dd668037
font_01_sfnt_off00010594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10594 17036 bytes
SHA-256: e44470b76ff90e265edf1e3e772a36501e4f808defafa7d8cb97d818772ba2ca
font_02_sfnt_off00013201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13201 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1