Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4bc5c824b6c1886…

MALICIOUS

PDF

96.0 KB Created: 2021-06-26 14:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bab6d68cc7ed3754100c96b8e6084b02 SHA-1: 323b840289b6c5504480da0fb144146e299e2129 SHA-256: c4bc5c824b6c188606a8277f30a57437d40192e0baeb67f1a6d5c9e672178ba7
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress upload directories, suggesting it is used to redirect users to malicious content. The presence of these links indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6037

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://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e715cda0cd---teguma.pdf In PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609842efcecf3---vipotatewozut.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/1cafd217f00c7e6363e8ab85ab9617a6/dorozifilezokuvudulitil.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/57209417053.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/7ef6d5c94a407a8d2070f8adbedb4dcb/17465977867.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/6e8ad302d53d110f0245a917a4614968/98820627489.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa3e6adfe2---71304790990.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2fe2df1dc8---86708292511.pdfIn PDF document text
    • http://birminghamseaholmclass63.com/clients/75362/File/58349558567.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5a6858b05---setokoram.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdad7e6c74---dexadoxapabijagosobaz.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/f98449bfc11ed2b7699f2f29ae32ccbd/10509366773.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a4160532d36---rotinag.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/nitipowinifof.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/a94990017a8747e2fb643f930d4c6a33/xamitotubug.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/87807632201.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09dcba9c3b---54434156633.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/vonukufenakenebabidupi.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/58259291500.pdfIn PDF document text
    • http://a-daily.jp/app/webroot/contents_img/files/wosotonifesi.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/subikis.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d4f2ead975b---30470194744.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/58993577594.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/55955819967.pdfIn PDF document text
    • http://xn--2-140-swe8h.xn--p1ai/files/58110432454.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=the+sacrament+of+confessionPDF 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_off00016a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A6E 10516 bytes
SHA-256: 73ad8b6cae82dccc8f042c6c39e7e8d1c104b9d6e2ab6219c22d1518a9834cf4