Malicious PDF — malware analysis report

Static analysis result for SHA-256 52f1e0a3f6c523c2…

MALICIOUS

PDF

72.6 KB Created: 2021-09-04 17:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bf4cb8fe4bceda0d0ecd178d422b4340 SHA-1: 3f92b7114d16e3e082fc19f4188924a499183a32 SHA-256: 52f1e0a3f6c523c278f792001924ed2a0c341ea3e2876bf124617a775c81fe2b
124 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous domains, many of which appear to be compromised WordPress sites. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent to deceive users. The presence of multiple external URIs and a link farm heuristic indicates the document's primary purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3165

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://triptoboloyfoundation.org/editorsfiles/files/34915246114.pdf In PDF document text
    • http://altus.pl/userfiles/file/mufoba.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16114c6fdaaaf5---69794966801.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/32803211150.pdfIn PDF document text
    • http://g-shocktou.com/user_file/file/84889073737.pdfIn PDF document text
    • http://topimmigrationlawyer.org/ckfinder/userfiles/files/sakebotaludabow.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/e5682df7f445aeb938510367fa682587/gigusifavugore.pdfIn PDF document text
    • http://toyotarenta.net/FileData/ckfinder/files/20210803_DF30C910BA467D33.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d81b71bde2---fowusesilamavo.pdfIn PDF document text
    • http://metabolitplus.ru/files/file/70142772340.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf928e59c61---munimukorotor.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/d7a9cf52c2c5fd527435026f24efbaed/14890433804.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/movojax.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/pafidakigidasur.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/8322247156f2977cc138217f3d0f9de7/80520282417.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/lorudagabuditevobabog.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/63294927000.pdfIn PDF document text
    • http://bananamusic.tw/uploads//files/202108101841406092.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcefad36ab---mulepifetakematakumijofiz.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5e5b9b76c---melonununujali.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/875741363.pdfIn PDF document text
    • http://vdtonline.vn/static/uploads/editor/files/75950975337.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5a2338643---17982950186.pdfIn PDF document text
    • http://shahnawazonline.com/uploads/files/38635836002.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160fb28de095ae---bopojilixexo.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/fipipixikejuwiva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=life+magazine+pdfsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE111 10496 bytes
SHA-256: 05891467db7246b3500512dc0c2d0892fc6fcc009ada6b1db34aa86f320dc2e3
font_02_sfnt_off0000f8ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AC 17432 bytes
SHA-256: 0fb5225f537c8368ddd6981f44a035c24b5cd689e092b49e25e0c6e81f7be69f