Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2a73fccfbaa7c05…

MALICIOUS

PDF

102.7 KB Created: 2021-09-04 21:32:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2e27fc353e505ec6d92b76dd23c71a42 SHA-1: f3e18621d370691a812882a28d586db79b466698 SHA-256: e2a73fccfbaa7c05261916b15b2110919d51584e59aef196cc7b7cfbbe575b4f
124 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to various domains, some of which are hosted on compromised CMS uploads or disposable hosting. The primary goal appears to be redirecting users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier clean score 0.2199

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://evevoyance.fr/adh/.-/file/36385853241.pdf In PDF document text
    • http://greece-ex.com/images/blog//file/bejeleb.pdfIn PDF document text
    • http://wjcopy.com/upload/files/37256167059.pdfIn PDF document text
    • http://skolky.info/foto/images/file/vavadisibobivofulokom.pdfIn PDF document text
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/nufikanofebiki.pdfIn PDF document text
    • http://thrifty-uy.com/files/others/36946699005.pdfIn PDF document text
    • https://subarini.ro/mm/file/fufurakerefejikogu.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/filelexolubo.pdfIn PDF document text
    • http://stasta.com/userfiles/file/xiwamibolupasoraxu.pdfIn PDF document text
    • http://jogagongu.pl/userfiles/file/rixuzigomekixevigogegizi.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/nogiwuj.pdfIn PDF document text
    • https://hoanghaie.com/Images_upload/files/xezuwirasexeb.pdfIn PDF document text
    • http://alexdisinfestazioni.com/userfiles/files/pagadivazosuxepigi.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/dogaviwoz.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/9ea7dc54e7afd20ce38fcc396d98c401/vipemasatarufubij.pdfIn PDF document text
    • http://forglory.cz/ckfinder/userfiles/files/91292315639.pdfIn PDF document text
    • http://www.logomarcanet.com/userfiles/file/bajawofuzavet.pdfIn PDF document text
    • http://www.octopus-quatuorvocal.com/ckfinder/userfiles/files/tuvinaxorumoru.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/d6dd96d05c6b2f1ea380a54951eecb2d/zubonidijogak.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e1ef7ad052---7720211954.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/kaxubivosesenorusominiro.pdfIn PDF document text
    • http://upasamed.org/Content/uploads/files/71128218887.pdfIn PDF document text
    • http://studiotecnicobonoli.com/userfiles/files/jonuxurekorixal.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609860cea2d54---45879931591.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/55818924673.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=2012+chrysler+town+and+country+radio+manualPDF 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_off000146cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146CF 11132 bytes
SHA-256: 4c4891acd3ed8c70f7e8c9b4ca1420b8ff25c6296d696116043354e5bba9d234
font_01_sfnt_off000160c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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