Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fae6102ffb82828…

MALICIOUS

PDF

423.3 KB Created: 2021-08-02 02:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: f2e9574213f0f5392971c7af402881cc SHA-1: 9041a18c88fb726685dbe1e8887e92300140945f SHA-256: 8fae6102ffb82828e9924b2916d5ae768417a8c6c2110041da431e1787c60df9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and ML classifiers indicated maliciousness. A heuristic identified a link farm pointing to compromised WordPress upload storage, specifically http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6edfa75e38---74118234325.pdf. This suggests the document's primary purpose is to redirect users to malicious content hosted on compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7235

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://psfund.org/public/uploads/files/cms_files/39805877821.pdf In PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/tujek.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/wagudiboziluvuf.pdfIn PDF document text
    • https://wietsevoermans.nl/ckfinder/userfiles/files/90703435271.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/fitasenodivifof.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/boleni.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9503553c1---71434171292.pdfIn PDF document text
    • http://bunny888.com/ckfinder/userfiles/files/safujudab.pdfIn PDF document text
    • http://tdbakademi.org/userfiles/files/fowijax.pdfIn PDF document text
    • https://dildendilecevirievi.com/upload/ckfinder/files/jodoborimidasumaveguv.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/ur13g6bu14hekcl078fpdl77e3/redotasusofepemo.pdfIn PDF document text
    • http://www.ochoadentalcare.com/tacgestorcontenidos_ochoa/documentos/file/In PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16072eca96e9cb---23598504001.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/98464482993.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607463891cf1f---64339956323.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/19938172144.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/2bdcbbc99451e327e3bc6cc86bfcd6b7/gilijisafevuzor.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/rilatibepudu.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1da602895---jikodexevibejefo.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/40832acb2040123b7840863c1a6f94c1/desukag.pdfIn PDF document text
    • http://stagnesreunion.com/clients/e/ed/ed16748122b3ff8ec97113314e0446c4/File/32212969149.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/3116c9d8d0b42dada79cf458d69941a7/semikuguponujawadede.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/f6il5mivnnktuq95tftjbu5mq1/salusapineto.pdfIn PDF document text
    • http://bhs76reunion.com/clients/e/e7/e717e6e8e39ea4daeda922698d41f3c9/File/22409187251.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/wavixovula.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6edfa75e38---74118234325.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=wooden+puzzle+solutions+6+piecesPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00061cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000634d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634D6 10568 bytes
SHA-256: 5253737bf028022170fa4dafb352e85d5997485daeaf1eb10c18f51403562a5b
font_02_sfnt_off00064d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D1D 19732 bytes
SHA-256: ddc1e722fd7d4ec8cc1cf4828eed8a2b974b58ebc5b3a625906abb0e33b65c28
font_03_sfnt_off0006800c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6800C 2752 bytes
SHA-256: 5002b73d1e7ed86861f0445e4c512d2a1a34980960353de9eb185942b20695b3

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