Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce116b2b98417e3…

MALICIOUS

PDF

70.2 KB Created: 2021-06-28 08:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 0043655c0945570832c9f8762de81dee SHA-1: 16429403606059990a6a4e65051b8046f72ace16 SHA-256: 0ce116b2b98417e376355ee8eafb69cb1e28021888cc46fb57416fda6c4792d4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs hosted on compromised CMS uploads and disposable domains. The primary goal appears to be facilitating phishing or distributing further malware by redirecting users through these various links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7252

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://medvor.ru/uplcv?utm_term=vacuole+structure+and+function+in+animal+cell PDF link annotation
    • http://vitacanes.com/uploads/files/jefesipusow.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/cfc57ce788722a9baa3667e1c62ba79f/tutajogivategajiluxakoku.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/1a6f98e964e937ab6a534e350a469756/paseruvekexaf.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/05ede78d7c1b654589eb41402854bc8d/xofuzinup.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/924b00afb6425d914d418ed195ed7eda/18860395348.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/c0b6bde29300f9fe37d4220c80603041/86572958049.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/foluvefigeberub.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/f3c10e594c8bdd7765d1a72c95ca47f4/70389967678.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/9c114c3716c55bc963968a63008b5263/41110100447.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/455055856.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/o6h0ag4dtvq45hu2jphatgrkub/wunizodezedaseliju.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c3335f99b2d---kobuvu.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/99811957376.pdfIn PDF document text
    • https://habrit.tw/ckfinder/userfiles/files/6005142752.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/86467254704.pdfIn PDF document text
    • https://mvmdigital.gr/files/files/gukanowogiwowimot.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/nvbdev234kid9icjigpto5dj2t/79601908699.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16097be93ddc79---vusesuvepadizalirux.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/19242060321.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16070fa6d6df3c---fawigip.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/ggbd31mdf6o5m8bfnddvuttps5/25122860100.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072f551f3f62---51201307033.pdfIn PDF document text
    • http://fotossc.pl/_files/file/zijemedoxu.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160acaee6460f7---womuz.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/ej7d9s6trj8bpb065khhpem3g7/davudesexafodu.pdfIn PDF document text
    • 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_off0000f302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF302 17040 bytes
SHA-256: a95cc57dbcf155d0850a2656f2705e8a3b9e088723c3b087d8a460b3e1e4e142