Malicious PDF — malware analysis report

Static analysis result for SHA-256 beba59ecce7357fc…

MALICIOUS

PDF

69.2 KB Created: 2021-09-26 10:35:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 163384641a23deb26d262a966d40f32a SHA-1: 5723708a94914da96fcfd77a3473e6f8a51ecd6b SHA-256: beba59ecce7357fc2df47c28a644e64bfd1f9a6f5316c453f59d02d828fd05ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous external URIs and is identified as a link farm hosted on compromised WordPress upload storage. The document body is heavily obfuscated, preventing analysis of its specific content, but the presence of multiple links to potentially malicious sites suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://krisoc.ru/uplcv?utm_term=wonder+woman+1984+movie+tamil PDF link annotation
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/161338334b62d3---3608122791.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/91265802770.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/ae2b98103fa777aab9568c4241dbfc8e/fejogonurasuwoke.pdfIn PDF document text
    • https://astdubai.co/userfiles/files/90328427405.pdfIn PDF document text
    • http://infinity-c-t.com/userfiles/file/8376928609.pdfIn PDF document text
    • https://kapokcmassage.com/uploads/files/202109162308395518.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613967ff977f5---nonepigobivojusowek.pdfIn PDF document text
    • https://eric-parnes.com/ckfinder/userfiles/files/ridil.pdfIn PDF document text
    • http://keitbg.com/images/files/54272221052.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/lobejuremejavafopaka.pdfIn PDF document text
    • https://wildnaturetravel.com/File/zuwowosudam.pdfIn PDF document text
    • http://noxsun.com/jingkelun/userfiles/files/20210916200046.pdfIn PDF document text
    • http://laskod.hu/userfiles/file/livoxasawagigufa.pdfIn PDF document text
    • https://daulte.com/ckfinder/userfiles/files/63458049853.pdfIn PDF document text
    • http://ilksolar.com/Images/Media/files/51902875941.pdfIn PDF document text
    • https://hoya.hr/UserFiles/file/94263252044.pdfIn PDF document text
    • http://master-vin.ru/files/file/26875723805.pdfIn PDF document text
    • http://giaphatmed.com/upload/file/punulasifi.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/fumanozuxomasuka.pdfIn PDF document text
    • https://sukaunited4d.vip/contents/files/ditaxoruvabemuga.pdfIn PDF document text
    • https://www.frontiermea.com/sites/all/libraries/ckfinder/userfiles/files/vesereseluzit.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_off0000af8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF8E 15216 bytes
SHA-256: 00f877854d0d58dbc3e0db66d3012f16f039e967665710fc1319cae8a54a74bb
font_01_sfnt_off0000d5d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000edec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEC 10892 bytes
SHA-256: f31bfb8d2130cda38d838b8ecb5a77bb90ec32723ba3c0dd38b4f8d3a9c885e8