Malicious PDF — malware analysis report

Static analysis result for SHA-256 545f9895ce9aaf6b…

MALICIOUS

PDF

63.6 KB Created: 2021-09-19 20:14:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 115d53f62de9d302eb0443d7a4976882 SHA-1: 4fe5d18f28384d82ffae1c04b34f84e24adea0d6 SHA-256: 545f9895ce9aaf6b36847441e468820cd04407face781e4a9ff4d85b2e6bd895
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous external URIs and is structured as a link farm on disposable hosting, strongly indicating a phishing or malicious redirection attempt. The PDF itself is malformed and likely exploits a vulnerability or uses obfuscated JavaScript to redirect the user to one of the listed malicious URLs.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4625

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://drafthe.ru/uplcv?utm_term=android+18+body PDF link annotation
    • http://erex.hu/upload/file/84891405983.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/080219333303.pdfIn PDF document text
    • http://av72-reklama.ru/userfiles/file/16305762918749d716ba1ac9121cc1.pdfIn PDF document text
    • https://hoangphatdanang.xetnghiemadndanang.com/uploads/image/files/25699736848.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135a66bb7565---zefipaxo.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/gazumabugokiselabisitanow.pdfIn PDF document text
    • http://xn--989ap7r0xbd5x.com/upload/fckeditor/file/74452166692.pdfIn PDF document text
    • https://1snrpaulista.com.br/ckfinder/userfiles/files/60509056538.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/vasubawamekujoxil.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vukotokugetajuworavajejef.pdfIn PDF document text
    • http://fitsiluet.cz/data/file/19357049063.pdfIn PDF document text
    • https://free-spirit-city.eu/uploads/wysiwyg/files/sowijogolowukeko.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/161338bbf7eb46---39874976617.pdfIn PDF document text
    • https://dzido.pl/userfiles/file/rabagifijatig.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/86559308528.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/kajekaxezule.pdfIn PDF document text
    • https://meritumptt.pl/dokumenty/file/83649413610.pdfIn PDF document text
    • https://rireenfrance.com/images/upload/files/mudogaf.pdfIn PDF document text
    • https://cape-electronics.com/media/file/vewedofumulanasudetezi.pdfIn PDF document text
    • http://dreamwith.gni.kr/ckupload/files/80923643671.pdfIn PDF document text
    • http://morpheus-architects.com/file_media/file_image/file/pubizokapirorazol.pdfIn PDF document text
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/49299929740.pdfIn PDF document text
    • http://hoachathoanggia.com/userfiles/file/60322069842.pdfIn PDF document text
    • 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_off0000c34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC34A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB61 10132 bytes
SHA-256: 8ca314551fafc60debbec9995b94ff46e727ee13e2e48f3714f62749319d3773

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