Malicious PDF — malware analysis report

Static analysis result for SHA-256 a966cff759cbdef1…

MALICIOUS

PDF

70.7 KB Created: 2021-08-12 01:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 38c9f43602ecb03c3145d11b8c4d37e1 SHA-1: 52733df53c56c674e396d6d19378fb404930a086 SHA-256: a966cff759cbdef12ed2dbb0070022c2b042fc004b63ca52c7e3d7c612b41bc2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple links on compromised CMS uploads points to a tactic of leveraging existing infrastructure for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9711

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://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/nuad2h8tuem5vapoii4g5sn2b7/pofevedelakavimatoriz.pdf In PDF document text
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/pu8ihfakiosjje029kga71q4bt/pavekawo.pdfIn PDF document text
    • https://mimpiindahsatu.com/contents//files/sexirubofuporipofuteg.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f12da3954---fegixifikakolowu.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/47739593763.pdfIn PDF document text
    • http://placc.info/up_image/65841245575.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c48d8b8dcc8---90052201884.pdfIn PDF document text
    • http://slsnn.ru/content/files/68939564873.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/fedoxas.pdfIn PDF document text
    • https://bimetoor.com/basefile/bimetoorir/files/46924868132.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16093c1f753b6f---51316533444.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/28bad5f8233de6b97aa686c921b7a794/24785307090.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd0707b8b3---zijigu.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/jelid.pdfIn PDF document text
    • http://rulife.ru/ckfinder/userfiles/files/togot.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e9302f6b3---ludepid.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/ed4aafafd35af92f8a67c3003613ab92/guwopozogovem.pdfIn PDF document text
    • https://cairparavel.ro/app/webroot/files/userfiles/files/93952915267.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/nekunomogorosa.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f55db7306fe---74157868409.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/togukelolikozivutar.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16070dc02ce3cd---68873428532.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/5e29ae4fe2fab78d5540359e49c14be9/lavisolijolupakazezafor.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0e6b8ece32---rivikis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=eric+worre+go+pro+free+pdfPDF link annotation

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