Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b218ac4386ad37c…

MALICIOUS

PDF

269.6 KB Created: 2021-06-19 18:35:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a4d3fba08f95a7e911043c216ae26fdd SHA-1: a8299d9ad403c4b98d8b0488857a1ecaf1746113 SHA-256: 4b218ac4386ad37c4d4f2bae0ee0f364f51391b3d2e26556accbd96e45b5eb9e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, several of which are hosted on compromised WordPress installations, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.
  • 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 http://belgium-ex.com/images/blog//file/38900860083.pdf In PDF document text
    • http://cloverpark1959.com/clients/51168/File/89489123019.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b211a3613c3---bozobudexufosibotopuxarik.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609fec043f3be---71528522997.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/rovog.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/96698020501.pdfIn PDF document text
    • http://toeicspeaking.net/_UploadFile/Images/file/gafexe.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/68f35bf1585b43a07db5c544f4b0a3be/zesipivisizowixofuw.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/ce20a8d67eeab888c727d140fc5d2590/71412379653.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840924daf3e---forowukijavetopavutezuvig.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/e70vrm6ucqsrkhe8e53k7vb49n/6951868909.pdfIn PDF document text
    • http://allycatering.com/userfiles/waxazulamo.pdfIn PDF document text
    • http://expresskaliski.info/file/zimepilovevab.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/negesobadovabusoxajuteweb.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/8k60hvidv99mj8kipdm9nm5ure/vinojakaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=two+pdf+to+onePDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003ec34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3EC34 4560 bytes
SHA-256: e849b76206b3982c13aef46c47f818e00b30f718409a895b13c9b973806d00ef
font_01_sfnt_off0003fbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3FBE4 13220 bytes
SHA-256: 638506d0712262e44fae75e49fd5228583e299d775549c1e7ee7a540daa77ef7

Open this report in the interactive analyzer, or submit your own file for analysis.