Malicious PDF — malware analysis report

Static analysis result for SHA-256 4978b9fda72dbe0e…

MALICIOUS

PDF

80.4 KB Created: 2021-07-01 14:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cd83f96e1515faeaace1e10709341b6f SHA-1: e064efdb1ba9477389fa8283598cf15791646945 SHA-256: 4978b9fda72dbe0e4fd0f70666867924dc1235adc545617a150385ec8544ac56
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed it functions as a link farm, directing users to multiple distinct hosts, many of which are hosted on compromised WordPress sites or disposable domains. This behavior is consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2676

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.
  • 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
  • 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://aartipalette.com/userfiles/file/49322458798.pdf In PDF document text
    • http://nct-vn.com/userfiles/file/tirulivesogelopowajofak.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/61983439336.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba8f534a82f---30902690638.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b07fab58d2a---75824644695.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c05698d3110---43088511929.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c53ea807700---verazibusojuvolozer.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160926adfadc8e---56512497634.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/74sqk3vkrfo65c9uil313sap70/nusajixijab.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c20c9eabe66---fujin.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/qt6uaaje188cgk2708lfehbed3/kutumagoganizubivikupeji.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160cf94e1ef8d4---81536324288.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/53917631189.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/fg2ksdu25jg48mgt4h5gr7hndn/gaxubur.pdfIn PDF document text
    • http://northwestpixie-bobs.com/clients/e/e1/e1941a3904c49320334fd90e0ed9e852/File/xubuginap.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/55937975154.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607722f7305d4---96837495395.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c586ab31983---84367499520.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/83716468327.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc796083330---74596925039.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078acc693d5e---pefutosurekuf.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/b3bd3c9bd42b6ff83003fcfb272800dc/14051408105.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bff6aa2b173---nimewufavori.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc91bc793b---jiduxegunipujonu.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099bee54b5b5---vapudekajoxafuvukap.pdfIn PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/wibuvobabumomupuli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=structure+of+a+diarthrotic+jointPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF270 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A82 16520 bytes
SHA-256: 63c9de14b47ce315d1c18905613a637a5c98da1cc1a75a63a30e63211e907689

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