Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecac361e1117f4ae…

MALICIOUS

PDF

54.2 KB Created: 2021-09-09 22:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c23704424afc4818ac7f96e0b723cfc5 SHA-1: b38654b022b845b676ffa8e7199510380ddd0d25 SHA-256: ecac361e1117f4aeffa7e10fb7ff3aa4aeb90221c2e7e41b6d832eaa4484487f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The presence of external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8347

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://infrive.ru/uplcv?utm_term=download+custom+rom+iphone+untuk+android PDF link annotation
    • http://cheers-gifts.com/userfiles/degejumotufenuwi.pdfIn PDF document text
    • http://sieuthimaynhapkhau.com/upload/files/nemamefutemolufegagimem.pdfIn PDF document text
    • https://campermagazine.tv/public/file/41093966567.pdfIn PDF document text
    • http://templeton.sk/userfiles/file/ferujitopasivolo.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/73725379991.pdfIn PDF document text
    • http://megatex-plast.ru/pub/file/gegosuwazuwupusab.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1613165ab3f6de---50928360776.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/38234625116.pdfIn PDF document text
    • http://gurukripapublicschool.org/userfiles/file/bufunaf.pdfIn PDF document text
    • https://www.hkfew.org.hk/ckfinder/userfiles/files/vadomopew.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6c8409108---kunisuneb.pdfIn PDF document text
    • https://agermag.ro/mm/file/69969969702.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/dazitukibososela.pdfIn PDF document text
    • https://coil.hk/upload/files/7755074639.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/26670731390.pdfIn PDF document text
    • http://insei.eu/userfiles/files/wotakoxakosolatowuka.pdfIn PDF document text
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/28226357796.pdfIn PDF document text
    • https://taptigrihnirman.com/singhania/downloads/file/7756269168.pdfIn PDF document text
    • https://andrejc.si/files/file/labigaremuduxun.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/kasabixitovuz.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/ji8mtpuk43aul00tlvc19ct626/9506398637.pdfIn PDF document text
    • https://777mto.org/contents/files/54562110092.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/17534469234.pdfIn PDF document text
    • http://biosite.ru/images/news/file/fewewu.pdfIn PDF document text

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