Malicious PDF — malware analysis report

Static analysis result for SHA-256 b65aa3bddb94b7df…

MALICIOUS

PDF

76.2 KB Created: 2021-09-23 18:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7e686eda526b7b5045d08c2ea20525b7 SHA-1: 3dc80e8efc70440acc21db1f43da588e2b85f12d SHA-256: b65aa3bddb94b7dfa47ed6950827b8d172a836011e1f0aa76165bad4a332a581
124 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs and is identified as a link farm, with several links pointing to compromised CMS upload storage. This suggests the file is designed to lure users to malicious websites, likely for phishing or to download further malware. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3164

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://crewmak.ru/uplcv?utm_term=watch+online+hollywood+movies+on+mobile PDF link annotation
    • http://plantessentialoil.com/upload/files/94386087831.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/qdeutipgbccvpjs4m61cech2g3/zepotuwokunewinifubivabe.pdfIn PDF document text
    • https://lmbri.com/WYSIWYGImage/file/ripoverolexomevufusisaza.pdfIn PDF document text
    • http://seasonsblinds.com/uploads/ckfinder/userfiles/files/68465750221.pdfIn PDF document text
    • http://baschin-heizung.de/meineBilderAlbertGrundschule/file/tevupanesupetoxubi.pdfIn PDF document text
    • https://komunalno-vrgorac.hr/files/rokidatutojenisutaxix.pdfIn PDF document text
    • http://eakqshop.com/ckfinder/images_store/files/jewagimezunurol.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/161408cafc3c93---98350150386.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/gidanukovatusajusus.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/20419957096.pdfIn PDF document text
    • https://renebeumer.nl/userfiles/file/30520431251.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/97346945229.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16141b79062415---54634679089.pdfIn PDF document text
    • https://toliveinchristjesus.ceosale.catholic.edu.au/application/third_party/ckfinder/userfiles/files/69478939117.pdfIn PDF document text
    • https://vasantviharproperties.com/userfiles/file/botirogepok.pdfIn PDF document text
    • https://vilus.cz/userfiles/file/kebimomaxofuwejazos.pdfIn PDF document text
    • https://restavracia02.com/userfiles/file/divuwetupegobetam.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1613c2b5be1875---xefaxapelawifaxuwize.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/58679757607.pdfIn PDF document text
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/xikixufu.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16140816f32d8f---vaxegexegotejumofo.pdfIn PDF document text
    • https://indirimlipin.com/calisma2/files/uploads/jariwukajamosabum.pdfIn PDF document text
    • http://kd-council.com/upfile/files/sixewoze.pdfIn PDF document text
    • https://bulendengin.com/upload/ckfinder/files/sugeguvuvowatarejifela.pdfIn PDF document text
    • http://bernendorf.ru/userfiles/file/15050635059.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb34983db8---50108991259.pdfIn PDF document text
    • 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_off0000da15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA15 10932 bytes
SHA-256: 7c43e7de9d7cad9db96c4c5b9e2e1b880d0695282530fd79ec3e2691c03efe4f
font_01_sfnt_off0000f350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF350 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B62 16780 bytes
SHA-256: a0f42937383f5bbb120e5ae515481cd7719c22508775b2b957f6979959997977