Malicious PDF — malware analysis report

Static analysis result for SHA-256 598e09e373dd6389…

MALICIOUS

PDF

95.6 KB Created: 2021-07-06 21:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 738f22f9ed676f79b2b6d044cfa9064d SHA-1: f8cf6334b069e4568035b7f01a7d7f0b0be76e02 SHA-256: 598e09e373dd6389f4f279b2b8eb75c0e9778bd98425852970320448f4144810
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 WordPress sites utilizing the Formcraft plugin for file uploads. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The link farm nature of the PDF indicates it is designed to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3154

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://queure.ru/uplcv?utm_term=things+that+aggravate+gout PDF link annotation
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4daab0247c---dajinisabobi.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/dscqoh6ngiivqt0g9d5gpia7k7/loxadosagaxadaranole.pdfIn PDF document text
    • http://ntep2008.com/UserFiles/File/xolavobadopivobufudu.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ace1106947---nijezabagamuvezexunen.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/wuxakupi.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1609a555e08df6---jurob.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/95292461326.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160752d5a94c02---92038903448.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d53f70e4ee---jujod.pdfIn PDF document text
    • http://attlas.center/userfiles/file/38339062277.pdfIn PDF document text
    • http://sherylrobphotos.com/clients/56056/File/12194466583.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5891c79ee---80647335554.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/e5tsdb7uai1bg2psj48t47p7qc/feluwepewikevalukufepe.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/80218242533.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/9b5q8ornp8are3nrrruiqm5n12/60247168989.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/875cb67e557c0e8c035f1d781b9136bc/seravatozavufinawekikeg.pdfIn PDF document text
    • https://naoshima-habitant.com/66433371355.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/21869435596.pdfIn PDF document text
    • http://statewideroadservices.com/clients/879378/File/42279117900.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/97060421615.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/22787564118.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6f8de107e---lixefotesanetuxomo.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878476e7912---17521387914.pdfIn 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_off00012240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12240 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A52 17372 bytes
SHA-256: e5dee9a6e91313b4c7e3643c208737a3dc18b7366e9d57b62bb3f6de20d39b7a
font_02_sfnt_off000167a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167A8 10468 bytes
SHA-256: e164bd84044690bc36a82b207860fe02e6a22c93c9cd71941139c1fddffefbf9