Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d4606e8dff2540e…

MALICIOUS

PDF

104.0 KB Created: 2021-09-07 10:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f8e866d91c37ae44a56510ab6fb94ee0 SHA-1: df6806590bde24e403d9c708b2e225dc2005aee5 SHA-256: 2d4606e8dff2540e1e3663444baf29e125ff6a2da2509482432758b408ddd556
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, containing numerous URLs pointing to various domains. Several of these URLs are hosted on compromised CMS upload directories, indicating a potential distribution point for malicious content or phishing lures.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4012

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 http://vonschickenconcord.com/uploads/files/medukutub.pdf In PDF document text
    • https://ontech.vn/images/ckeditor/files/50122692896.pdfIn PDF document text
    • http://abwgulfport.com/uploads/files/rupuxikaputap.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/26630330590.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/21984842759.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/56438678702.pdfIn PDF document text
    • http://amdind.com/userfiles/file/gadixazozepagudijufedu.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/730baba66ce9a6c83f2af3074400752d/4024022046.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160895b5847b24---zenabas.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b924995c1b2---xolazatetanif.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b2b2dfe46---zajuzejazekiwasusiwuxex.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/58860653352.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/numerisozuvozologomobosok.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/9nqk29v4jur1dtacr3urk4oon4/12928015044.pdfIn PDF document text
    • https://xpress2.eu/ckfinder/userfiles/files/19825368493.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/hu3spo10qmfrc9fe2g7e6q19fv/denapolejaxufebur.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/9c3a1af9e660167b81196414426609d7/48944457708.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/30de9c3f88fddb5702fa52f334f9da13/nibunolinobagefalaw.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c08f1092c10---pefuponamuvuzikenudob.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/mipulakomemitanisu.pdfIn PDF document text
    • http://indovinandoilmondo.it/themes/userfiles//files/mazijovepav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=bro+code+barney+stinson+francais+pdfPDF 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_off00014a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A69 10872 bytes
SHA-256: e0ef3191c42500a195aeb7687e0f39cc53392fe23b4b4756ebb64efbfb541bbc
font_01_sfnt_off00016387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16387 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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