Malicious PDF — malware analysis report

Static analysis result for SHA-256 92428aa89fc090ba…

MALICIOUS

PDF

59.6 KB Created: 2021-08-04 06:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 77ad8e04769facd3e0dafa985ba079c6 SHA-1: 4c27b6c26a6ddab3a3b4f0ec143df9934c726b96 SHA-256: 92428aa89fc090ba65afa2bd1faa98b0d6f5cc218ad4d13382cf1f9506bb90a9
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 ML classifiers, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised websites and disposable domains, likely intended to lure users into downloading further malicious content or submitting sensitive information. The presence of multiple compromised CMS upload links suggests a coordinated effort to distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5358

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 http://byty-pardubice.eu/UserFiles/File/naleviwo.pdf In PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee54c3a6d2---97546861136.pdfIn PDF document text
    • http://xn--k1akb4c.xn--p1ai/userfiles/file/zojipazusafuv.pdfIn PDF document text
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/96600724847.pdfIn PDF document text
    • http://bulmarconsult.com/files/pukezimenu.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f3d6b8fea---lupugewebixebajibu.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/dedemusigasobera.pdfIn PDF document text
    • http://eternoohydro.com/d/files/58247077901.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/gouhpmp8akkoabr5el9jfvg30c/xotadewevorimitobezive.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/tusijalu.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e21cf34a98---32506900564.pdfIn PDF document text
    • https://jxlmedu.com/file/files/20210718_235305.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/179f258c1614240c497caaf120acb06b/60733540148.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/161063bfe6bf7e---820281182.pdfIn PDF document text
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/21267195323.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/44831790059.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/a756d671ed742be2767879aa0a1ea3a8/54493708137.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160ac81cd7509a---kujijerazipulotanav.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16109245d585eb---72439807846.pdfIn PDF document text
    • https://numen-wow.com/userfiles/cloud//files/tosativewosuwuzokafururu.pdfIn PDF document text
    • https://fentesmakina.com/paket/upload/files/bosemuri.pdfIn PDF document text
    • https://netpage.info/userfiles/file/44746675460.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4395d49aa---81048251064.pdfIn PDF document text
    • http://cerrutistudio.eu/userfiles/files/64071316739.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=6+ejemplos+de+ejercicios+anaer%C3%B3bicosPDF link annotation

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