Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a25742e06fd129a…

MALICIOUS

PDF

57.2 KB Created: 2021-06-24 20:21:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c011063a1594037ff4a74859375da8e7 SHA-1: 37e51fb58506a76c16a89a0661ecb7550896f2f9 SHA-256: 6a25742e06fd129a4826b5594b8fcf2619d9b59c6d32bbe9828e9f12992bfe34
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites. These sites, in turn, host other PDF files, suggesting a chain of malicious redirection designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/f84b7d21bfd34dbefeb96c8bedd9c49d/2942064089.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0143ee1de---88249543454.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/41211547835.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c720bbb1254---70856622389.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f377a9d949---11506029711.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16078090296818---letojagenatib.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3badb7cbb1---papebelujawijusuvunovutu.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af591897ec---74756527280.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/42268838382.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/51c8cpm6l6kbag91kh04akm6rc/375058900.pdfIn PDF document text
    • https://777mto.com/contents//files/98205145780.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/nazidisebobumu.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/99921406985.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/5taqhh6chvinsmteh617d9fq63/69662776116.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce22b4c1ad---tuwutesimelawit.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/64506299552.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/mabanudekelepovumupuwev.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fa8ade26c---salad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=saraswati+introductory+macroeconomics+for+class+12+pdf+downloadPDF link annotation

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