Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0327e9e60b4cf2c…

MALICIOUS

PDF

71.3 KB Created: 2021-09-09 08:32:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 97c886ca0153d8dd1ae0a274c30c562d SHA-1: cb4d13a5ffe50c6ce14c41c417bc5c4e911340bd SHA-256: c0327e9e60b4cf2c7a4bf3ef84f47df40ba4c9b6c55cd12c643641334b5bf770
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected by ClamAV as Pdf.Phishing.Trojan-d2568dad23a94d95. It contains numerous embedded URLs that point to various domains, many of which are likely part of a link farm designed to obscure the ultimate destination. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a high number of distinct hosts and links, suggesting a malicious intent to distribute or phish. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4270

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://careerroots.net/ckfinder/userfiles/files/nadibejav.pdf In PDF document text
    • https://samowar.ch/upload/file/bavisuvidox.pdfIn PDF document text
    • https://geneolock.com/ckfinder/userfiles/files/80696007180.pdfIn PDF document text
    • https://gemma.lucien-sv.info/uploads/files/61384fa10b391.pdfIn PDF document text
    • https://megashina24.ru/files/files/wilaxilusefuzu.pdfIn PDF document text
    • http://madiagranitosilano.it/userfiles/files/narepekolux.pdfIn PDF document text
    • http://hla.vn/upload/files/pigusevizikimepupakosu.pdfIn PDF document text
    • http://tnslib.su/userfiles/files/84034251889.pdfIn PDF document text
    • https://swaarm.de/app/webroot/upload/files/velepapare.pdfIn PDF document text
    • https://e-motorcycle.tw/upload/emotorcycle/files/jirimonoso.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/22063211480.pdfIn PDF document text
    • http://jjkxmy.com/upload/files/202109051238187283.pdfIn PDF document text
    • https://tyko.pl/userfiles/file/56347108594.pdfIn PDF document text
    • http://delfosventures.com/userfiles/files/viweg.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/161396bee4c2a2---59205649270.pdfIn PDF document text
    • http://vandientuchinhhang.com/upload/files/14702987862.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/31783963581.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/jisabavodakaxafozajalu.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/05pt8e98nb29b4os6qdltt2irb/rituzetebetemut.pdfIn PDF document text
    • http://sentai.cc/data/file/20210903_014458_348.pdfIn PDF document text
    • https://goldenlinejsc.com/userfiles/file/42419326432.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/dawuda.pdfIn PDF document text
    • https://esvigo.com/upload/files/8829740115.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/bojili.pdfIn PDF document text
    • http://cmtdental.com/upload/ckimg/files/44932260997.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=java+app+for+androidPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD420 18356 bytes
SHA-256: 4a2e03ae06295e5c0a0d2ee02077a80d52a3ecbf5c47b8781f1404f8a175bb75
font_01_sfnt_off00010342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10342 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1