Malicious PDF — malware analysis report

Static analysis result for SHA-256 a38c0e2327ce16b5…

MALICIOUS

PDF

124.9 KB Created: 2021-08-12 10:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: ad2a2cf64c9c32683cb843497225cd3b SHA-1: 0d52d8b8953c93a3f5b054ee4b5802cecff5f557 SHA-256: a38c0e2327ce16b5cfcaf59934c352701ea7a0dab0a2235d0b5f26417ed7aebd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics point towards the document being used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://oniceh.ru/uplcv?utm_term=how+to+wear+chanel+necklace PDF link annotation
    • https://sistemagestiondpr.com/userfiles/file/14397404996.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/16840419825.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/71998489541.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5258d2e5a54d760fdb0fa23f853597e3/31975983366.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/53112921686.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/golanakabitag.pdfIn PDF document text
    • http://poornasreehomeoclinic.com/ckfinder/userfiles/files/pelezof.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/fiwidor.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/kodalepazofeziru.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16082b4c54e327---17944454766.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/423b5c2d027171924e19853ee0a9119d/21777469427.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a000fbe7940---47618903324.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16201972824516.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/fi0m1mmr0lprdma2im6hth8ccr/24353163598.pdfIn PDF document text
    • http://bjsprt.com/uploadfile/file///2021070801030159.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/tubupabawelubijogek.pdfIn PDF document text
    • http://hermanosgolbano.com/admin/fckeditor/editor/filemanager/connectors/phpfile/30956262647.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/48b6d5d1de7e9dc5ba2ae34cb562c38b/datubito.pdfIn PDF document text
    • http://614move.com/clients/4890/File/79250518318.pdfIn PDF document text
    • http://amandamaitland.com/images/file/80645370563.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/39329870800.pdfIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/53199586250.pdfIn PDF document text

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