Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b0616676f3013b4…

MALICIOUS

PDF

79.4 KB Created: 2021-08-24 23:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 86b91d4e7f612c98f8ea15e1a5234821 SHA-1: c792e5753da05d6013cf846b748accd7a4283124 SHA-256: 2b0616676f3013b46334ff2ae4667c9b95873b9aa7cf026726db42804ee920f7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple URLs pointing to link farms, some hosted on compromised WordPress sites and others on disposable domains. These elements suggest the document's primary purpose is to redirect users to malicious sites, likely for phishing or further malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/94234054554.pdf In PDF document text
    • https://traffictkt.com/viking1/uploads/files/fibewoxozaka.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/86217421900.pdfIn PDF document text
    • http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gisewogelivifux.pdfIn PDF document text
    • http://vienhung.com/webroot/img/files/28129514083.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16089137672f53---47457097391.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/23234945954.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/wexixuromuv.pdfIn PDF document text
    • http://faizleathergloves.com/userfiles/files/ragopijasixakot.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/22341666196.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/semefusodorimoborajasidi.pdfIn PDF document text
    • http://jcon-aps.dk/userfiles/file/joxexanolanepowalo.pdfIn PDF document text
    • https://joinvita.com/neu/userfiles/file/17217123937.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/a82062a5fdffd5617571731dacda6907/bowamitalinixobifimura.pdfIn PDF document text
    • https://fu-ko-property-agency.com/webroot/editor-uploads/files/3879467854.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/3a2d0df7293250d87398c119e239c3bd/gatigatopokibaparu.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1610ae2497757f---kesavudowax.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/texivusojakunu.pdfIn PDF document text
    • https://www.sacict.or.th/ckfinder/userfiles/files/25325894705.pdfIn PDF document text
    • https://anjingliar.com/contents//files/23543606033.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103cc54bf349---buzotujego.pdfIn PDF document text
    • http://entrackintl.com/uploads/42065641040.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=starting+a+sentence+with+and+examplePDF 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://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_off0000d304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD304 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1B 11104 bytes
SHA-256: 37dcbd51811a81b00f23780d2c447031ee4543cbfde1897f22e2794d0698336a
font_02_sfnt_off0001049b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049B 16988 bytes
SHA-256: ed58bc94f08012b40c1049522b9e21adbca9d8225fb60272c8ad9c5381f863eb

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