Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a1b06e149929013…

MALICIOUS

PDF

91.5 KB Created: 2021-09-02 04:03:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 128b0d4934b2b55f5ec3e79344b277c7 SHA-1: 2e41a933e15ccf0209ea87033c501e3ee5604230 SHA-256: 6a1b06e149929013e4464a39a2f73cc9742adc6c9a81428404e8ce1362d42f02
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to domains associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. ClamAV detected this file as 'Pdf.Phishing.Trojan', supporting the assessment that it is used for malicious purposes, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.1990

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://chemtron-vostok.ru/media/file/nuxogewavuge.pdf In PDF document text
    • https://nhaccugiare24h.com/uploads/userfiles/file/81831207112.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/61374670999.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c0ece53cb---68547299126.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/fovenotenapevekun.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610ce71361794---88295613669.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/118f387cd8e9277b026bef97a063aef3/4430264842.pdfIn PDF document text
    • http://holzbau-napetschnig.at/10316092046.pdfIn PDF document text
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/30367441163.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8565c34996---86969972896.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/ummehc5j6ir1ebi1g64r73f3f6/wogeluzo.pdfIn PDF document text
    • http://studiodispirito.it/userfiles/file/67826012315.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/gejikoxavipadagakenada.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/nedameforojivilijiwabo.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c886f7ef73---sajagekajajinaj.pdfIn PDF document text
    • https://anup.bo/images/files/kigoveg.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608a43a3e0e9e---tawotoxaxakodosotonogik.pdfIn PDF document text
    • http://roomyab.ir/basefile/roomyabir/files/suroronokaleteminis.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb9dfac2fa---daligadatosexeju.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/74ae1dffbd036179a39d7859bb94d443/51585771911.pdfIn PDF document text
    • http://woodbridgeabw.com/uploads/files/wilinajigobakififadon.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/koxedodexoz.pdfIn PDF document text
    • http://synowka.pl/galeria/file/diwogekos.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/a7b4ed6b098da7b9bc6af7d266167387/80741211462.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/bud522oijm31esf92u271ju65u/xasobubi.pdfIn PDF document text
    • http://kimyasaldubeller.com/upload/ckfinder/files/81012194546.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=boxing+day+mondayPDF 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_off000118a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A4 10316 bytes
SHA-256: aacbb3f426b44b8700d32622aee63bfbe3127baa96317708ee9ab8c86ecda3ee
font_01_sfnt_off00012fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1