Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a84ddf605adaa40…

MALICIOUS

PDF

52.6 KB Created: 2021-09-08 09:29:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9bf2186531791e55c9403f56f96de045 SHA-1: 2c74f5b3adb348a1be82096ae35b639611075641 SHA-256: 2a84ddf605adaa40acc9a2ac5ee57dddf9d7da7b6e008556f09b9d991dac76b2
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised CMS upload directories, suggesting it's designed to lead users to malicious content or phishing sites. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7276

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://krisoc.ru/uplcv?utm_term=xiaomi+mi+airdots+manual PDF link annotation
    • http://ipmarketing.net/FCKeditor/editor/filemanager/connectors/userfiles/file/nelimebixe.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/17169670280.pdfIn PDF document text
    • http://modra-skola.cz/userfiles/file/7664702738.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/ovfc2hhecp5he3jfk9q0i3ma03/vexudezi.pdfIn PDF document text
    • https://folklorebridge.eu/uploads/pictures/files/jixemin.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/85674234148.pdfIn PDF document text
    • https://synersys.fr/contenu/file/25367346453.pdfIn PDF document text
    • http://jaika.in/images/documents/files/14295989119.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/53003924750.pdfIn PDF document text
    • https://www.willmarshelter.com/ckfinder/userfiles/files/42754365295.pdfIn PDF document text
    • http://gyarmatilovastorna.hu/userfiles/file/bupusof.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084221869e7e---nisafatotiwotepadigomagi.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160806844c7105---51216680874.pdfIn PDF document text
    • https://mangalargalux.com.br/ckfinder/userfiles/files/vosorobirisilovesatagon.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/9624c5bd53976a2b80a6ad4f2c2b286c/mozaxuv.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/d0hbm23s4v3cq6um4iqpg75ic4/18743499983.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b577885ca0b---tisugofo.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16111d547756ba---93088864393.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e3bf1201a---nunutuk.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/3et2lnrfosjod60180nt1qp17f/64339273798.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/4e2fd2b2f24142d3e1e013506eae93f5/remubejikazugudewebujaf.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b348f30953---gifibuvelozusimujogomaki.pdfIn PDF document text
    • http://interfacetraIn PDF document text

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