Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5d2677822d1eff…

MALICIOUS

PDF

60.8 KB Created: 2021-09-26 22:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f2f7c92ae7332771519e3415908963a4 SHA-1: 05462316ffae09ea3416e5778528cb272f9098be SHA-256: be5d2677822d1eff6e82af936a5df1441eedd7cd9d359f4a1d1df85f22dea4dc
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, many pointing to disposable domains, and is flagged as a link farm. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest it is designed to redirect users to malicious websites, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5920

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://laps.pl/userfiles/file/vewipixufilepar.pdf In PDF document text
    • http://creptiles.dk/userfiles/file/99517979672.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/vubipimamijabakamaxoset.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/30402408657.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/faziweran.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161469b89e0df8---wozoziwuvu.pdfIn PDF document text
    • http://neapol-m.ru/usr/file/dubobo.pdfIn PDF document text
    • http://roseeskin.com/userfiles/file/20210924140357.pdfIn PDF document text
    • https://xuanhongkhang.com/upload/files/buvevalizewexozuwidekogas.pdfIn PDF document text
    • https://spacio.hk/attachment/file/21069938073.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/fubililimuxodolomamifel.pdfIn PDF document text
    • http://adhdesign.de/userContent/files/20210925055206-bitotepopomapazewavufetu.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/cc47fb90d2c20f01c2f5a164871d8df5/karezakilodopi.pdfIn PDF document text
    • http://ckm-machinery.com/userfiles/files/jegemuxumaxosawewopinewu.pdfIn PDF document text
    • https://globaltranslation.com/demo/global_translation/beta/userfiles/files/86579988579.pdfIn PDF document text
    • http://www.yevres.fr/ckfinder/userfiles/files/3177675988.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/lijizadogapulomusovenamox.pdfIn PDF document text
    • https://euroquimicadistribucion.com/zabaleta/data/imagenes_contenidos/file/rebarovemubizerepitaz.pdfIn PDF document text
    • http://saimiri.name/upload/file/144219201.pdfIn PDF document text
    • https://bengalroys.com/ckfinder/userfiles/files/59391280614.pdfIn PDF document text
    • http://twinmd.ru/userfiles/file/13047367682.pdfIn PDF document text
    • https://iva-vietnam.com/userfiles/file/78945859117.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=watch+baseball+freePDF 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_off0000ad99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD99 10248 bytes
SHA-256: 249cfd5d9f96aba8a2de7eaa38013ad83e4c7add11c5b7e92c56cdfab063391d
font_01_sfnt_off0000c4da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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