Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfe01ef61d6c634f…

MALICIOUS

PDF

72.1 KB Created: 2021-09-01 08:33:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 43fe9387bf8e7f9cdc44b88cb8977d5b SHA-1: af90eb29630c9dc94c6c60c9ecbaa425ad97370f SHA-256: cfe01ef61d6c634fe2fc221e63335f0abc0ef8c9e8cdf4d595df979b806024c9
144 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it's a link farm pointing to compromised WordPress sites and potentially malicious PDFs. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or trojan distribution intent. The embedded URLs, including one pointing to a raw IP address, are likely used to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4060

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://caramelitos.sk/files/kotit.pdf In PDF document text
    • https://sp-pir.ru/wp-content/plugins/super-forms/uploads/php/files/551c686ae59f15e9864f52220a676220/mamegaribu.pdfIn PDF document text
    • https://beytarimcilik.com/admin/editor_resim/file/kewetejamanusovek.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070298c74d13---57628150589.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/161237e73abf66---46395996196.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/97009246930.pdfPDF link annotation
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/300c26ed71c46578c1054b65f8b81aa5/minujopezogutosaviva.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160e6bf3353341---57427330342.pdfIn PDF document text
    • http://greenbrier101.com/userimages/gesivujaduzenafemip.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/3649629000.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/xenegoxovudafegozofuvuto.pdfIn PDF document text
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/sasofeludopujisufuredujej.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079cc9c97f52---livifelepe.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/145eekancjj9p17q6r1lotr4am/66347042812.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe0e4cf22f---67141817908.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160767e1222b35---25396921711.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a7dfdae43---1853593075.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/4vrqil60v05225jfrjvu24a2tg/wedexufemogamugowagedu.pdfIn PDF document text
    • https://hissekurban.com/resimler/files/vitabi.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5810db6b9---81757688782.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4ef6623e3---67211784472.pdfIn PDF document text
    • http://dostrojar.sk/UserFiles/file/sogide.pdfIn PDF document text
    • https://98ing.com/upload/ck/files/20210805_000736.pdfIn PDF document text
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/sapurukaxiwavojosabo.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/44584924670.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=my+tears+gone+cold+i+wonder+whyPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECE 10844 bytes
SHA-256: c277fdd6b6f9a62e424d44c14fa0d49997f1d9910f0947e74d12d28f616b2d11