Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0dae287037c8a73…

MALICIOUS

PDF

69.3 KB Created: 2021-10-13 22:16:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: dbd337777cc2e6601319f7a2052ba3d4 SHA-1: 1efc499b00ebe9b9b4d170ecbb7cff159cc2744b SHA-256: d0dae287037c8a736e537005ac32176fc28fb3e42c7af7f29f63b547638c9ca9
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to external PDF files, suggesting a link farm or redirection mechanism. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a non-clustered link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6693

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 http://ttlh.vn/storage/ckfinder/files/radexuzubewavusi.pdf In PDF document text
    • https://norservis.cz/files/files/79230034987.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/jilobifuxil.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/suxogusonakijoxikiruzelix.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20211007095056.pdfIn PDF document text
    • https://sportnazona.bg/f/uploads/files/woluxonagud.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/sufudewixulovagadoreket.pdfIn PDF document text
    • http://otworz-biuro-podrozy.pl/userfiles/file/50220964881.pdfIn PDF document text
    • http://mprime.net/ckfinder/userfiles/files/fuguwebekudinatipafob.pdfIn PDF document text
    • https://pernambucoimortal.com/imagens/files/49572230680.pdfIn PDF document text
    • https://transport.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/lekulanexuzazosut.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/95132217495.pdfIn PDF document text
    • http://www.romanschatztruhe.de/img/files/tovelilisobobav.pdfIn PDF document text
    • https://aletihad-group.com/userfiles/files/loluvabube.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/2fbd7d31d092da5b7c734966fff2c63e/befuvowabanupazikilixe.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/r6jlh2tilch7q1koqofe9no3up/12327148772.pdfIn PDF document text
    • http://belst.by/upload/file/turelizobeva.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/14112071935.pdfIn PDF document text
    • http://moristas.com/userfiles/files/18934036384.pdfIn PDF document text
    • https://wic-net.com/userfiles/file/salomijolon.pdfIn PDF document text
    • http://sanruou.com/app/webroot/uploads/files/3551462173.pdfIn PDF document text
    • http://vitrine-prof.com/files/migutunawize.pdfIn PDF document text
    • https://rolcsi-bau.hu/userfiles/files/gozemivimuwokov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/TxADE9PCSUw/uplcv?utm_term=materials+used+in+chemistry+labPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF708 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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