Malicious PDF — malware analysis report

Static analysis result for SHA-256 1641e431e126213b…

MALICIOUS

PDF

75.5 KB Created: 2021-09-05 08:25:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 32985cef190a5d7cf184015a64527fda SHA-1: fb0d643b5adeeb5d032f13c4484fc276a27bcb44 SHA-256: 1641e431e126213bbbf0a5293ab5596354b6c1d5b8d4b1aec158dd51ea455699
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to various websites, many of which appear to be compromised or disposable hosting. The presence of these links suggests the file is intended to redirect users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7007

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://ketchas.ru/uplcv?utm_term=kitchen+supervisor+job+description+pdf PDF link annotation
    • http://pwmtqatar.net/userfiles/file/sudimovokumijojakemo.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855d415d238---81764925422.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/3egiif2qrvfiq9djf1v4ikk6ea/43800855259.pdfIn PDF document text
    • https://nhadatonline24h.com/Images_upload/files/rakojasufelejiputatet.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16099bc85ad225---99053904321.pdfIn PDF document text
    • https://drsaman.com/files/37087291336.pdfIn PDF document text
    • http://oicenglish.com/imagexx/files/jalisezidalufose.pdfIn PDF document text
    • http://teplospectr.ru/images/files/mebebinovagitefikaviwafel.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c4920a7a959---bojena.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab736e8501d---simiwejezuxizoro.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c27ea1af93f---75495696018.pdfIn PDF document text
    • http://cka-shiba.com/ckfinder/userfiles/files/59323068705.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/90337715186.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/dpjmivue1ihgd003h2jpf7osoh/88326430567.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/7e1e4517bde718ebe1d5c04340df87fc/xupivonokujamakon.pdfIn PDF document text
    • https://cape-electronics.com/media/file/12524146799.pdfIn PDF document text
    • http://domplus.su/userfiles/files/sexofelofasab.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/1d6da3a14ae01d35cd0a20ecde6db8d6/90263579555.pdfIn PDF document text
    • https://migger.dk/userimages/file/29296358061.pdfIn PDF document text
    • http://xn--42-jlclgg6a3e.xn--p1ai/userfiles/file/75545925893.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/bizewezopa.pdfIn PDF document text
    • http://otevrel.eu/ckfinder/userfiles/files/xajizamifowuvenugojaz.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/sifipekuvav.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/89731503170.pdfIn PDF document text

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