Malicious PDF — malware analysis report

Static analysis result for SHA-256 c65d5224c49c8533…

MALICIOUS

PDF

69.1 KB Created: 2021-08-15 06:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 0c74a74f2cd93d00ef616f85ba1a5e96 SHA-1: 67b03e59e83b4a9688569dc9ddc9ff8273212cba SHA-256: c65d5224c49c8533bff6c2b1f0da323e230ead48ad561d0f8a9b3fd252dd16a7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of multiple compromised CMS upload links suggests a pattern of hosting malicious files on these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9032

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 http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160877d0086543---kuwataru.pdf In PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/177bdcdc8323568b2a6b30bdcb0082df/kasenumiburuzexezedin.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/l78hm0f4g6cae0197t1qmf4786/novigakipuwovi.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/101016028093.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/f7b89b1d0ba6610ecffd8ce49da53150/53712129761.pdfIn PDF document text
    • https://tkquiz.com/userfiles/file/malewesuwixotelagidabuza.pdfIn PDF document text
    • http://snft.ro/media/file/zitulijevepubiti.pdfIn PDF document text
    • http://falerisztika.hu/tmp/22518056117.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a1c29a5ba---95175658332.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0c2d9c4d24---sowulaguxomubukugukumofip.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/lawibefel.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e8305ff1208---46537081873.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/80974027938.pdfIn PDF document text
    • http://gojjang.com/uploads/files/dupur.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd6ececdbd2---muguzigoniwenarekenarax.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/cdaaf114ae1c9904ee3fff9a97fa25b3/41681496595.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/pesasa.pdfIn PDF document text
    • http://revucue.com/ckfinder/userfiles/files/zumunoko.pdfIn PDF document text
    • http://primaneighbors.com/userimages/85942867255.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb01ac2ee1---ropibosipukis.pdfIn PDF document text
    • https://smg.bid/ckfinder_userfiles/files/nubuwaforexe.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/10783126178.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/66545665350.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/viduwesofikojuwowek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=mas+alla+de+los+sue%C3%B1os+pelicula+completa+en+espa%C3%B1ol+robin+williamsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF258 11200 bytes
SHA-256: 62e79e380eabc44b13fd8c814e3edd201ddff301fe1d09c4167300df79df4b83

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