Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebbfa2614c22f655…

MALICIOUS

PDF

44.8 KB Created: 2021-09-06 11:23:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5adfd90ccbaa53f17d0806eb27365e42 SHA-1: e046aef8ed5363603714069b2090cc8cd23ebb1d SHA-256: ebbfa2614c22f655ee5aeb9b025eacd94b9ba70d0d8fef4ca0f86cc0187df2a8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6809

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://chcial.ru/uplcv?utm_term=contempt+of+court+act+1971+bare+act+pdf PDF link annotation
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/fb9e1696690ca8b5d9b0e4a39bed1a2f/58354254264.pdfIn PDF document text
    • http://mertlakustika.cz/images/pages/file/38524820809.pdfIn PDF document text
    • http://sm.ac.th/ckfinder/userfiles/files/mejuzasosifotev.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aa33a06d982---90410434673.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/80348d3ad8658bfe41b42c5d42b7234a/98755364668.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/10802431633.pdfIn PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/3782222263.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/puxogotolebiborupevovep.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/nmie15l2ruunop8mmqn05scsf2/kawukexuwojog.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/55852081741.pdfIn PDF document text
    • https://gachbinhduong.com/upload/file/44321220210.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/1fadbf513c722dd143467d477b71e92a/nazinigewigo.pdfIn PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/mulepariziwodimogamururap.pdfIn PDF document text
    • https://colegiumaniucarei.ro/ckfinder/userfiles/files/milejezogukanuv.pdfIn PDF document text
    • http://merwepizza.com/upload/file/wuganovuv.pdfIn PDF document text
    • http://ilovechardonnayhills.com/userimages/sidobobo.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a97b9df67d---1138884736.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/3919224761.pdfIn PDF document text
    • http://webelievedin1984.com/clients/6/67/676624d6593aa512bfa6e10e765af00e/File/sezefaber.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210827070633.pdfIn PDF document text
    • http://geo-equipe.it/userfiles/files/77438384218.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/tuzogerubobugivatekalimu.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1e11dcb90f---lekotavixaxe.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/21829cf85da4d1140d711c798d4904a7/somovejukiwobidukeles.pdfIn PDF document text
    • https://bulgariapools.com/contents//files/17317377978.pdfIn PDF document text

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