Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a724ae06c0a15f…

MALICIOUS

PDF

93.2 KB Created: 2021-09-15 12:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 26a1340bc057021582980724f8f25b3a SHA-1: 7ba609f67f7ac85b8e20367ed0d3b121083b41e7 SHA-256: 00a724ae06c0a15fdcf4cba4ffb9263f897025b2c0dbb984f9db446fc41d0a35
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, pointing to a tactic of using SEO-optimized links on compromised sites to distribute malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6303

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://philabc.ru/uplcv?utm_term=dragon+quest+2+android+walkthrough PDF link annotation
    • https://ipekyolumedya.com/resim_galeri/file/tejekifazetixin.pdfIn PDF document text
    • https://csmgh.net/pevron/www/img/file/55102100221.pdfIn PDF document text
    • http://lnv-cnc.gr/userfiles/file/3554577699.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/tafalajapawoniloz.pdfIn PDF document text
    • http://donghotam.com/luutru/files/memowos.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/kefepodut.pdfIn PDF document text
    • https://adikkedua.com/contents/files/52243392009.pdfIn PDF document text
    • http://alpes-de-haute-provence.proximeo.com/ckfinder/userfiles/files/kibarozogapari.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/41432602707.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/75101d3103611e657ea23d65912ab4b4/dijisorasefurimel.pdfIn PDF document text
    • http://icloudcleaners.com/uploads/account/autoresponderfiles/44043995729.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/fd4b93bb9efac644b1c65ddfa41e58b4/15154890662.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/55156661215.pdfIn PDF document text
    • http://unionasset.net/file_upload/spaw_upload/file/20210901223354.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141aaee99b0e---gazijinewonunuvorev.pdfIn PDF document text
    • http://hitplus.eu/userfiles/file/xapedezagowanu.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613670f75c9a2---zogoginone.pdfIn PDF document text
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/punatozifujaririror.pdfIn PDF document text
    • https://ijfbacknumber.com/editor_up/1980106030.pdfIn PDF document text
    • https://www.aicsmindia.org/ckfinder/userfiles/files/semuw.pdfIn PDF document text
    • http://drumlockingclamp.com/FCK_Editor_Images/files/nubekot.pdfIn PDF document text
    • http://intertexmedical.com/userfiles/files/banakopaxuxivo.pdfIn PDF document text

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