Malicious PDF — malware analysis report

Static analysis result for SHA-256 055417dea866c3e9…

MALICIOUS

PDF

70.3 KB Created: 2021-09-04 17:30:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a0aef678395c0a29d35e97ea05732d06 SHA-1: f47116a8900f43ec5f321f00351af8841d8eb3e3 SHA-256: 055417dea866c3e9d8c902e13d0f490e69afb7be143b52e3dcacb97b2f3cd9b5
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to compromised CMS uploads and disposable hosting domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8257

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/15249810279.pdf In PDF document text
    • https://geneticapanama.com/userfiles/file/97755523651.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4b84ca5d5---narowewenofemetaje.pdfIn PDF document text
    • http://www.florentmaussion.net/userfiles/File/11533673465.pdfIn PDF document text
    • https://himanshikitchen.info/viking1/uploads/files/28680836176.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/eae5521f8c3748f51da6db615366d47c/58580370010.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/dlsjf0f13s5u0u3g56fltkc9j3/16678052479.pdfIn PDF document text
    • https://deltarealestate-eg.com/userfiles/file/66773358906.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/15349a87a7e2286cb6fda77a55016965/40981555636.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/14257433833.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/4af4a7b82cebed158c3f14aa9114683a/69145092112.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609459072a685---53395872482.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/92ebb3e82134f000067cff3a5393bfd9/notijawivakafabefimukitog.pdfIn PDF document text
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/97015560924.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/90639342752.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b4122b5059e---xivafamoviluj.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/b2929264f66054cee7a5dbbd2994cea1/digujawox.pdfIn PDF document text
    • http://wwstationery.com/files/file/bixuvodufikudis.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b743841f225---zorujatomujidesel.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071820cb475a---wulifab.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/54e5065a9f85462e9bfe15b448d2d058/15299148348.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/7kklh4q89rlq7avj96qbhujab2/66997478211.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/3b4ad27a67a64cb40457ba4739efaf64/feparulukepaku.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc6b042147b---11828704935.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=formular+widerspruch+gegen+mahnbescheid+pdfPDF 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_off0000da93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA93 11272 bytes
SHA-256: 5b11a3fade0cc694a5e0bff6c5b3b171a03eba887a59306ef18e126a69f8c87f
font_01_sfnt_off0000f46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1