Malicious PDF — malware analysis report

Static analysis result for SHA-256 430ba24941da2c92…

MALICIOUS

PDF

87.1 KB Created: 2021-08-09 04:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7e803a3201665a7b188974679d78efcb SHA-1: 1dee30c364d3e882d6098ed11a4e90ff9d2978dc SHA-256: 430ba24941da2c92d88198a622cc168328e58e41bf97478103a7d905ad889d8d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as a phishing trojan and flagged by an ML classifier. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded links indicate it's likely part of a phishing campaign, potentially using embedded JavaScript to facilitate redirection or further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://livresdarts.com/ckfinder/userfiles/files/64657878313.pdf In PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/q33nk6r9u7bj1ndjefo4t700p9/53649833797.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/7beb55f87dfcf0ada3617359794ed480/navanet.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/3d682b717e275a17c10b335619e99656/xasenilarixumarogoge.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/65987687821.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/datakugukafiwaboj.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/aa82e0f302092aac3dc0725afb8a9ab9/82371134297.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/19c04865655aab0ba0ecdd0b193640ad/kukevusi.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/24e5a32c6ce36105d5e761ff44d62c2c/8711967911.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/03df79e5ad1e2052065ed24d47b88efa/75206619955.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/84925945f291ae4fad260cea9f4c3039/87132508716.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/c207d1082e4456c11c04d373bc234ecf/nisawamiwuladomebaruxeveb.pdfIn PDF document text
    • http://myblindz.com/fck_user_files/file/91624296092.pdfIn PDF document text
    • https://argumentua.com/i/file/23919254221.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160703876ac8b6---93373296794.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3379a9442---92538968437.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/bodekuzudanotumab.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/zekobepof.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/zawisirofogoxuzevakep.pdfIn PDF document text
    • https://drproperty.in/userfiles/file/besal.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/f0e9f69l6uodjle548rhl9ien1/76376320782.pdfIn PDF document text
    • https://yepsell.com/userfiles/files/sodexuzetun.pdfIn PDF document text
    • http://boston.pl/fck_pliki/file/zadek.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a17b1c72145---gojozuzopoxanunumilezugew.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085403e76962---748713332.pdfIn PDF document text
    • http://www.mustwalge.ee/data/content/files/27854967336.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=inner+space+strategiesPDF 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_off0000efa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA5 18272 bytes
SHA-256: e2f49c59dac06e1a639533ba605ffe59413a3ba7949863f182ad0faaa0ba4acb
font_01_sfnt_off00011f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F80 10332 bytes
SHA-256: 2a79063b728c9b7daaa8b82c39975960db80ff49eafee00955c72612b51e2516
font_02_sfnt_off000136f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1