Malicious PDF — malware analysis report

Static analysis result for SHA-256 92d521b835f4aa71…

MALICIOUS

PDF

93.7 KB Created: 2021-08-01 06:27:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1ca3cbd9b8303c73dbb67de47e933bf1 SHA-1: 9814c13a19b50605df782bb1d3d4c418e678a30b SHA-256: 92d521b835f4aa7196a0f0a92d9032dd43ec79a0b59f377a235d32a0decbcddb
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a phishing trojan by ClamAV. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded links indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4559

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://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090a0ad8cac5---watuxunuzanewedo.pdf In PDF document text
    • http://tlumacz-lipno.pl/pdrzewiecki/files/tubatutefonodofugetabopir.pdfIn PDF document text
    • http://orhs89reunion.com/clients/77823/File/wakavezufoxulibabu.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/3770308483.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b496643c16a---96485996104.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/0n2d4cf4f38bi59l7r2k2q469n/nosonipupoj.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/29trqc8ctsnk6f611i2gpa2q12/fonulipuxijunowusejoj.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/73873083262.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/ff03ce293b2164579ea4572b41ec0f21/21330439113.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc4812c7ee---fevofiwa.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160becf33c3706---18411351368.pdfIn PDF document text
    • http://sumosushingrill.com/uploads/files/lefofozo.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160791a8724c5d---51943042729.pdfIn PDF document text
    • https://namkhoasaigon.vn/web/images/files/11726128571.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/mekiwozapumenizukasurimap.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081095f30369---zuliwopogukilapijuru.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/1c34848a5c5533aaf5dc1b0b5a2e820f/46077792395.pdfIn PDF document text
    • http://hondaotohaiphong.vn/upload/files/rezilomofusarunijogur.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021043022082028.pdfIn PDF document text
    • http://sheeld.org/clients/d/d0/d021426cee8527c21a172be12ef3d645/File/4172740815.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/82711710351.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/dolaziwevoguzuzibil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=what+does+tiger+lily+mean+in+the+biblePDF 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_off000124fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124FC 17096 bytes
SHA-256: 110437e9ea4a5a329261799e1b517355859bddf7a3dcbc54ede43e24861cb3df
font_01_sfnt_off000151a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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