Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ecab3b954dfbdb9…

MALICIOUS

PDF

74.9 KB Created: 2021-10-10 20:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c92da6bbcce7c7530ddb2355bbc89710 SHA-1: 5c92a292e91a86a13712cb435a232dc1d8ba0b44 SHA-256: 6ecab3b954dfbdb9c41ad18347b3110d1cf006a783c2f0a89d0e118c741fc451
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous external URIs, including one pointing to a raw IP address, suggests the document is designed to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the idea that the document is a link farm intended for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://thewhitmerlawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/80281522236.pdf In PDF document text
    • https://bor-diing.com/upload/files/nekezefubofudizawudab.pdfIn PDF document text
    • http://wuchem.com/upload/files/jazevirobugonoxanulidu.pdfIn PDF document text
    • https://udruga-invalida.hr/files/57424569095.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16145a0cf9625a---kozipifubekujanuv.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/pulefigumipebavarisatap.pdfIn PDF document text
    • https://terminarz.online/kosmetyczka/krakow/files/17537181137.pdfIn PDF document text
    • http://thamcohoaian.com/webroot/img/files/31542883568.pdfIn PDF document text
    • http://deauville.ru/files/file/tefirivonaromadabefegoniv.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b377864f72---kokobovuxewok.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/wifebir.pdfIn PDF document text
    • http://www.insight-assessment.com/ckfinder/userfiles/files/856206461.pdfIn PDF document text
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/65782262993.pdfIn PDF document text
    • https://kalashad.com/userfiles/file/dukenumiga.pdfIn PDF document text
    • http://pzhjintai.com/upload/files/pinozurigamixovorajosas.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/17801348831.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/vijupu.pdfPDF link annotation
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/sqdn7a233i9jb7dplr5ogofg4f/84850535308.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16160d26c0223b---12549576691.pdfIn PDF document text
    • http://onlinevay.com/upload/files/25769798307.pdfIn PDF document text
    • https://www.libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/menife.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/jexiwak.pdfIn PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/tosofa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=seven+days+in+purgatoryPDF 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_off0000c0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0CC 10876 bytes
SHA-256: 223c99ae56ca8c4266e19e8b01e3670bc3b2e76d24a0d2ffd3701dfbd833ac96
font_01_sfnt_off0000d9ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9ED 17132 bytes
SHA-256: c1c78bf9add4320539fec9ed681734a524aec32b7b2731f4db6155252cf440ca
font_02_sfnt_off0001063f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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