Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd30a56d33bc0946…

MALICIOUS

PDF

84.2 KB Created: 2021-09-24 07:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: aecfadd52c885d8aa032f986ce31efe0 SHA-1: caef27f1546d9241d657b38cc1129c8783d7af1d SHA-256: bd30a56d33bc094674c5a0639439eb5f21e1ee30dced349be1d37f9cdcf0828f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms, suggesting a phishing or malware distribution attempt. The PDF's structure and the presence of external URIs indicate it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=watch+frozen+2+123 PDF link annotation
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/3fl8hvmc2jio0hovh36hd7ms26/ninejivat.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/sominifopadunidaduva.pdfIn PDF document text
    • https://adverto.ee/userfiles/file/66058389234.pdfIn PDF document text
    • http://maketmaster.ru/admin/ckfinder/userfiles/files/vajatijinuwet.pdfIn PDF document text
    • http://ticketsperiodico.com/galeria/files/88485777918.pdfIn PDF document text
    • http://kammatrans.com/userfiles/files/49400935070.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/09hml02elp210vp02j21ddhpae/60849736042.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/707388736.pdfIn PDF document text
    • http://dpsszczytno.pl/photo/file/81299489474.pdfIn PDF document text
    • https://hattoco.vn/images/ckeditor/files/47213498508.pdfIn PDF document text
    • https://viettrungson.com/media/Files/bamobiz.pdfIn PDF document text
    • https://tomaszbizon.tomaszbizon.pl/web/uploads/files/51106684501.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/68644612749.pdfIn PDF document text
    • http://toroisg.com/public/images/files/serewe.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/xanifajovunuvonasinaf.pdfIn PDF document text
    • http://packturf.fr/files/7819767176.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/pehhls276mm62ndrdql8mgmms7/19503505752.pdfIn PDF document text
    • http://abbeytraining.net/userfiles/file/51850575016.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/74929126230.pdfIn PDF document text
    • http://fisioterapiasuzzara.it/userfiles/files/jamozotifotemagidorulugo.pdfIn PDF document text
    • http://akwarella.pl/user_uploads/file/29813932322.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/12172015988.pdfIn PDF document text
    • https://rosenstein.lu/userfiles/files/rarozujilafado.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/82739332764.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_off0000e395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE395 18448 bytes
SHA-256: dea455a6cf3f8d2c7374d74992e14335fa484abf2c53256bf71f93b043ad81d1
font_01_sfnt_off000113a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBF 10524 bytes
SHA-256: eb75ba9f81dfccc35e444528b46a1dc9ab21d8ad1a8b3fa88de27dace280b2db