Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0a3b892b6672f37…

MALICIOUS

PDF

66.5 KB Created: 2021-09-19 06:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: aa359230556e91872aee5d54adb76f2f SHA-1: d6edf4a00f594047d0fdecdf52fbbeb2366cd209 SHA-256: f0a3b892b6672f37982286060154a3329a27b1bbe19586c9cd2e0271dc23f5d6
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The file's structure and the nature of the URLs suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6961

Heuristics 4

  • 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
  • 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://cpghollywood.com/userfiles/files/zusujide.pdf In PDF document text
    • http://kleinschaden.expert/userfiles/file/35766910078.pdfIn PDF document text
    • http://progettarecasa.com/userfiles/files/garexadi.pdfIn PDF document text
    • http://ap116.ru/userfiles/file/50416551347.pdfIn PDF document text
    • http://offerparts.com/upload/files/16773344691.pdfIn PDF document text
    • https://sunpower.lv/ckfinder/userfiles/files/doniwolonete.pdfIn PDF document text
    • http://palazzodiaz.com/userfiles/files/fivowoserizazazinirulolux.pdfIn PDF document text
    • https://ibliberia.com/ckfinder/userfiles/files/tuwevuve.pdfIn PDF document text
    • http://mawratanews.com/armedia/uploads/files/4190545721.pdfIn PDF document text
    • http://fpempresa.cen.es/userfiles/files/66347845043.pdfIn PDF document text
    • http://www.bargiel.com.pl/ckfinder/userfiles/files/lutirobadosixagozategedop.pdfIn PDF document text
    • http://christopherdallo.com/file/83605519130.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/mijazofakipatuvexoruroma.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/vewifexenofal.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/mamabaw.pdfIn PDF document text
    • http://gmkms.net/upfile_editor/2021/files/lamovuboteromerefu.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/vosejibuxasakokuvopegudi.pdfIn PDF document text
    • http://mirutte.com/newsfiles/files/nizorov.pdfIn PDF document text
    • http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/62371216645.pdfIn PDF document text
    • http://bloemenwinkelindex.nl/images/uploads/88967042982.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/161467e92e0644---14087041967.pdfIn PDF document text
    • http://dienlanhlongan.com/upload/files/1461148909.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/sazidunusopemafotodo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=effacer+historique+application+androidPDF 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_off0000cf6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6F 10944 bytes
SHA-256: 04daa96bcaf7cb02dd54280921847401d9242dfbc933ed0b7a6e30c9593a7791

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