Malicious PDF — malware analysis report

Static analysis result for SHA-256 527ce0de02b5f36f…

MALICIOUS

PDF

47.5 KB Created: 2021-09-19 05:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4aa01aada591e79f08f31f95b638fcc5 SHA-1: 9f8fe6b3113883d0f5e86ec0028ee965627fff9a SHA-256: 527ce0de02b5f36f7fccc3abe232ce3b061f043a82781a43c2219155a2b517df
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host and distribute malicious files. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5618

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614172dea41b6---37640289057.pdf In PDF document text
    • http://kccmaul.com/files/files/24640360991.pdfIn PDF document text
    • http://fukaofoods.tw/uploads/files/202109071925028080.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e1826907d9---62499820311.pdfIn PDF document text
    • http://pataibicaj.hu/userfiles/file/6169297135.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/19882443034.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/37817524344.pdfIn PDF document text
    • https://itchanoi.vn/uploads/news_file/jasajiweroputufezivafar.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/14111982202.pdfIn PDF document text
    • http://murito.fr/ckfinder/userfiles/files/65459814095.pdfIn PDF document text
    • http://studioaba.net/userfiles/files/52231646098.pdfIn PDF document text
    • http://telecycling.org/files/file/66874379249.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/c4670d1a3d24c8527db9c4b9ef23431c/85956710313.pdfIn PDF document text
    • http://schokozentrale.de/idata/31734240994.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/userfiles/fichiers/99009098737.pdfIn PDF document text
    • https://mogilew.ru/userfiles/file/28374250205.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16136fd174659e---gaviberapofofefi.pdfIn PDF document text
    • http://yingtailong.com/upload/file/210919052012910030j6ltc6rgyoyt.pdfIn PDF document text
    • https://losungversorger.com/product/file/wobukupoxasemo.pdfIn PDF document text
    • http://hefei.chinatupai.com/web/js/ckfinder/userfiles/files/giriwenumer.pdfIn PDF document text
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/5201ba0aa3c46636814e7451b4441cd1/61692783390.pdfIn PDF document text
    • http://unibeauty.com.br/ckfinder/userfiles/files/zokoduxoxodege.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/42313679836.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=download+hill+climb+racing+android+1+comPDF link annotation

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