Malicious PDF — malware analysis report

Static analysis result for SHA-256 f85d503d1a1006ad…

MALICIOUS

PDF

50.8 KB Created: 2021-05-22 15:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e691db7cfe10837d7ea9a1a2b4faa3e4 SHA-1: 22c9add74bc921aaaa82fc7ff5264e8189b6adda SHA-256: f85d503d1a1006ad4dc72cce7e4f211714c0a7b2a592c25866212abce9754f60
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to compromised CMS upload directories, indicating a link farm designed to host and distribute malicious files. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, but the structure suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6779

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://angarakshaksecurity.com/userfiles/file/68772384812.pdf In PDF document text
    • http://envigest.cz/upload/file/47846605241.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/717cd352696da968708fc74192162a0b/kiwafekatopel.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/9d516080c7bf194c608bce015c97581a/texetetixuf.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/5ovl62mmi166g1gi2fjhjt1mp5/gozoxibil.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608483fcd5a1a---dafitadafuje.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a6761ded3d---72991176568.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/ef1f631c2a0297f03801b90ef967acd0/bivigetufiwoliwi.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/lnrl7c7onbqorepe8vs7c63jni/vumidulebopafim.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16077a1bb16353---50015940553.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/1agrienvfcpbho08qdlft8sau8/42285012217.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/ddc435538d0745f4c8c57b5b1842484a/jegenukonejararopipef.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7be4380d9---famesejavegudo.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160729bca5da72---54373388475.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=ventajas+y+desventajas+de+un+inventario+fisicoPDF link annotation

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