Malicious PDF — malware analysis report

Static analysis result for SHA-256 5af16ebb767c24ca…

MALICIOUS

PDF

56.5 KB Created: 2021-09-23 07:18:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1505d0ee0f641d98a252f0940dbff703 SHA-1: 46050f5f13ad96633965d1dd09f0c9900e3f03c0 SHA-256: 5af16ebb767c24ca863fe3e7115847ad2fe8818e94aaefe68c03d9b1db8e788d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress installations. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, and the 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' firings confirm its malicious nature. The primary purpose appears to be directing users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7352

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://philabc.ru/uplcv?utm_term=interesting+3d+shapes PDF link annotation
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140b28944f55---1672429026.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebb4ec16f7---wikuwo.pdfIn PDF document text
    • https://www.andreivieru.com/ckfinder/userfiles/files/nasudub.pdfIn PDF document text
    • http://twtipa.com/upfile/files/2021/09/10/21094806501.pdfIn PDF document text
    • http://cuacuonnhaxuongbinhduong.com/upload/files/naninagoxamizedijatezati.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614162b47c109---gisogexolezuxewidu.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/damenejisev.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/7ec92d6ade4cbf6790ad788f0a726abe/baluxumuni.pdfIn PDF document text
    • http://www.sloepverhuur-debiesbosch.nl/upload/files/42487398356.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/cb5243b84944b2f4b154bd2ca82dbced/86117242658.pdfIn PDF document text
    • https://luminex.pl/upload/file/zodekutimir.pdfIn PDF document text
    • https://mimpisiluman.com/contents/files/mututubojifunanefedi.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/9131079559.pdfIn PDF document text
    • https://www.psk.com.au/application/third_party/ckfinder/userfiles/files/10129461908.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/dbb1c160a909b34589bb864f088afc66/89658031315.pdfIn PDF document text
    • https://paidionresearch.com/userfiles/files/kuvowoguxutawofevopegol.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/didilunajajodukuvikedasol.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/gowoberagorupukob.pdfIn PDF document text
    • http://aptekainternetowa.net/_mdm_apteki/file/7175834131.pdfIn PDF document text
    • http://nhakhoasaigonkimcuong.com/uploads/images/files/tetivixidezexot.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/tusuj.pdfIn PDF document text

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