Malicious PDF — malware analysis report

Static analysis result for SHA-256 19ef2b2948744b8d…

MALICIOUS

PDF

44.2 KB Created: 2021-06-24 11:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 33a801b3e663d26631bee5e71c5eca90 SHA-1: aad02add7b5a0f471e6e38d9342ee3afafcc2a98 SHA-256: 19ef2b2948744b8dee76726bcd0db0d6f494eec168ce5e9e69b6406b46545cf1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8172

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://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b4db49083---femusizojubadomu.pdf In PDF document text
    • http://dajuicebarus.com/uploads/files/punugexawipejifasogum.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/82140263f2ae8b5a9efac425fb10ff60/bepanebobak.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/275fd4b682b39b172333f32f7e1db8f8/83277553826.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f823d556e5---78913922028.pdfIn PDF document text
    • http://nfc.soo.jp/file/fufinumo.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075394ecf46c---zaruxen.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4837d2b2a---lemaduwivusekolibe.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2f76da212---71797706765.pdfIn PDF document text
    • http://balone.net/_upload/file/%5C/pipamofetopibegazolasosi.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/ko646oe4atuj7943afa62e99t4/35993043783.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/c7118f946d5852dd9e3ed8899f8439de/1751691670.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbb1f44b1e---xeximaf.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f0a55d68e---pibuvipik.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/12788215736091b6200d4c8.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/1mk51bhfmpapeii10usvn7eos3/zozozazaraseme.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/gawisojudodilefu.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/tc8soob0bn51umr5vvrfrs053o/bodedisulorepajezujisazi.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/88818162848.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=5th+geography+book+in+marathi+pdfPDF link annotation

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