Malicious PDF — malware analysis report

Static analysis result for SHA-256 68476e4a770a9092…

MALICIOUS

PDF

110.4 KB Created: 2021-06-17 18:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 57c72382694393d6fe25348bf84d2e53 SHA-1: 19f0ae977a51238ee50784bf442cea578e7c101f SHA-256: 68476e4a770a90922e45fd52d273539c8b0558385a8f5952da508b55cf491e7d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • 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://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c22f7ceec02---pevupevud.pdf In PDF document text
    • http://musikpark-live.de/userfiles/file/50835607734.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078efe8e43ed---mimuvibupanijadun.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/9951408651.pdfIn PDF document text
    • http://usarsenal.it/userfiles/files/mobobigetuvenazudunavikoz.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c683215daf---84704756161.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763e1d42580---wekitubuv.pdfIn PDF document text
    • https://pacpartner.net/images_client//imagesfile/gukidokevuzuj.pdfIn PDF document text
    • http://roxburyhs1987.com/clients/63080/File/39776265866.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/bebixipi.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e52c8a5982---49769183980.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/hht11qh5nh0piob3b6igemmscm/88085083210.pdfIn PDF document text
    • http://roughriders66.com/clients/f/fa/fa96273273f04fd2a06feef12b1e4d70/File/sotimexojevovuzojum.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/46312881d830aea5108cd3ff0cbd2995/wozuxafevif.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/tobijabozolil.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/ngfLrbzwjls/uplcv?utm_term=ahmet+cevdet+pa%25C5%259Fa+mecelle+pdfPDF 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_off00017071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17071 5420 bytes
SHA-256: adf22b3a04685d99dd63aaafd920f33496eadd9d2f248e0f6203dc20736392d1
font_01_sfnt_off000182c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182C4 13776 bytes
SHA-256: d84b59a2d3a8174c71b72b23c39f1c5575e79d2c17f221a37ba255be0f2bade5

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