Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba80644524887ba…

MALICIOUS

PDF

78.2 KB Created: 2021-08-25 12:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e825d8f39c8082904089358b1ef6e38a SHA-1: 4eb08b6c9293ebca12540666a0706d562cc1dc6b SHA-256: 1ba80644524887baedabee3fdf49b9f76631d46fb55426994ffa1e2a8635e126
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's designed to redirect users to malicious content. The embedded URLs, such as http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cddfcac1316---jifalolufigujo.pdf, are key indicators of this redirection behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6314

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 http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cddfcac1316---jifalolufigujo.pdf In PDF document text
    • http://abimobiliare.pl/pliki/File/rajiwodogeg.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/95bb9fd217e40415ed7be207f71dc4eb/gagilakojimusofakide.pdfIn PDF document text
    • http://skkouty.cz/ckfinder/userfiles/files/49951635461.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/29c3d4342e165edd2daa4bdcb516c461/gebodav.pdfIn PDF document text
    • http://ldbell1965.net/clients/85689/File/36138730104.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/c91e8cd7080f41dd53b3af2ed5cb3a73/wepozazubawefajusuduximi.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/bikomipiwuvuzexetigoj.pdfIn PDF document text
    • https://floridagreatescape.com/media/file/96286048041.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/38833063404.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073ac6c098ce---23587828741.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/tqqoebevt7hcunv3bcqpp26iua/79261166654.pdfIn PDF document text
    • http://hunde-katzen.at/soubory/vutelugotorumilapipalu.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/jokafavavolinalo.pdfIn PDF document text
    • http://smartarts.bg/userfiles/file/fasowim.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/gasigumemenifafifat.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/suvebumujevivowaberevizif.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/fewijupalo.pdfIn PDF document text
    • http://www.dereformasenalicante.com/archivos/files/kilebo.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/mps8saog5jfa0eo0cq39jrjgud/kebofelifutukiduvagus.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c638236d5c8---78115246122.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607387224169d---nedaripudavivolu.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/24287345144.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=50+shades+full+movie+downloadPDF 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_off0000e985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE985 10832 bytes
SHA-256: dc74710df548bcd016858442044712edf101ce8c69a08ece81add9466fcb9fd6
font_01_sfnt_off00010266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10266 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1