Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba2f0cad887b91dd…

MALICIOUS

PDF

93.0 KB Created: 2021-09-17 02:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6d93c5814c48d3d507496076705e4dad SHA-1: 83eef271f485ad305df480c17317be4b455b0175 SHA-256: ba2f0cad887b91dd5bbb35d0a6bd1a455227cac8648f5740fec083eb3d3a6d70
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which point to websites hosted on compromised CMS platforms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://nomylo.ru/uplcv?utm_term=directing+successful+projects+with+prince2+pdf PDF link annotation
    • https://verandapattaya.com/userfiles/files/77109107734.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/161437e1bb2d5c---73075096878.pdfIn PDF document text
    • https://rafaela-motores.com/userfiles/file/90881612470.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/12073a00786ca969dbbf663e2f17abcf/laninogawuwefoxajesate.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/bamozidox.pdfIn PDF document text
    • https://vwb.mrv-educationservices.com/content_file/files/derufuxazin.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e9eeea326---tuzamijonimagosaw.pdfIn PDF document text
    • https://www.geya99.com/ckfinder/userfiles/files/mafuletaboxefodel.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/gakenel.pdfIn PDF document text
    • http://ersenergy.com/UserFiles/file/47221035264.pdfIn PDF document text
    • https://kamhosting.nl/ckfinder/userfiles/files/16059375669.pdfIn PDF document text
    • https://drakbera.com/ckeditor/ckfinder/userfiles/files/11961223447.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aa22a5e429---35237400443.pdfIn PDF document text
    • https://rajaketiga.com/contents/files/matogizububok.pdfIn PDF document text
    • http://njbeihang.com/uploadfile/file///2021091016050641.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/78565242442.pdfIn PDF document text
    • https://minlinart.com/archive/upload/files/doguzowufewefe.pdfIn PDF document text
    • https://perfecthospitals.com/ckfinder/userfiles/files/rudomozajukenax.pdfIn PDF document text
    • http://haitrungkim.vn/uploads/userfiles/file/91076244481.pdfIn PDF document text
    • http://peter-scherer.de/userfiles/file/736989494.pdfIn PDF document text
    • https://bnovum.hu/downloads/44888858662.pdfIn PDF document text
    • http://tongkhomica.com/upload/files/22941860918.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/81616205797.pdfIn PDF document text
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E0 17948 bytes
SHA-256: aaebcc9f2872e1e70e29ee92ac3842daf32309839d0f3c7caedf028b35a3c181
font_01_sfnt_off00013485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13485 11172 bytes
SHA-256: 809544835a19d98465b6833b99d3ab561cdce2e138e7ecc5bb4ea5d37e8a29b7
font_02_sfnt_off00014e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1