Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2c1ff0c14583aa…

MALICIOUS

PDF

83.5 KB Created: 2021-09-21 06:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 8f9681869b08cd867b4950596c10dfb0 SHA-1: 3944385cebce71b92eb638044b62677938065725 SHA-256: dd2c1ff0c14583aa01ca9ee491cf0b3ec29c14f7d45c64222dd9490222404663
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or trojan distribution intent. The presence of multiple external URIs and link farm heuristics confirms the malicious nature of the document's content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4428

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://allytemp.ru/uplcv?utm_term=san+andreas+2.00+apk PDF link annotation
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f10bc4fa2f---8711173748.pdfIn PDF document text
    • http://ueros.fr/admin/ckfinder/userfiles/files/91094824717.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/765e9aff247b21e6787d83b128f725bd/juxuki.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161412e4fe232e---15663285643.pdfIn PDF document text
    • http://snieznik.pl/userfiles/file/sowisat.pdfIn PDF document text
    • http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/80404710804.pdfIn PDF document text
    • http://evpltravel.com/xv_image/file/24828661020.pdfIn PDF document text
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/vifadoxumapuv.pdfIn PDF document text
    • https://tennis94.fr/img/pics/files/37273312018.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/81166898712.pdfIn PDF document text
    • https://fcimoveis.com/imgs/file/71885044133.pdfIn PDF document text
    • https://ismart99.net/upload/files/4658604159.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16132113bc500a---21315248160.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9b1a370a4---88344195280.pdfIn PDF document text
    • http://hizirferforje.com/admin/fckeditor/editor/images/file/73304030907.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20210901085541_sg9ime.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef49241167---mived.pdfIn PDF document text
    • http://s13cf5ef.alojamientovirtual.com/ropadefutbolbarata/userfiles/file/xugofida.pdfIn PDF document text
    • http://domuran.pl/files/file/pubatepuvazirepinekos.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/tufubed.pdfIn PDF document text
    • http://otohondamientay.com/upload/files/nudebesajejaguxanutej.pdfIn PDF document text
    • https://tivirtual.com/userfiles/file/dolobojirufumujawusag.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/kawemipikukato.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B0 1904 bytes
SHA-256: f597d7774414a22c688aeea277495186450ff07f0e8b36a6f38a946b63ea5bae
font_01_sfnt_off0000fe87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE87 16616 bytes
SHA-256: 49af41c334f2da4edc30131be9facf51f80c7c1213b44db5ff7dd55037aa2ff8
font_02_sfnt_off00011609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11609 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012e20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E20 10504 bytes
SHA-256: 48f7394b070545928fea0ca2202679f25c68019c77da1f68f478f9d6374717f8

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