Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed73576394410924…

MALICIOUS

PDF

89.4 KB Created: 2021-07-08 05:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 818135a0ebdcf0c27388a0966a1b09ee SHA-1: d8fe534b2d41fcbe426c2d4923f683c652850804 SHA-256: ed73576394410924e5f4194c56475629053e513d2442ef4624efee78a446c0dd
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to direct users to potentially harmful external resources, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://coretry.ru/uplcv?utm_term=plastic+waste+pollution
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbb20884d6---30785279855.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16082317a5f548---fumajux.pdf
    • http://naturalmis.com/userfiles/file/58261251373.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0e9f41e0ac---gamaxulejoz.pdf
    • https://vibangnhadat.com/uploads/files/86754484501.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a9920e7d577---26252468003.pdf
    • http://baigeleather.com/userfiles/file/29765218805.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a09da75d3e5---xabimudugapowenaxuliwa.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/a729044a80169f83b2aed984f9c8fbca/45712816167.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d094d2a977d---97002815.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16099b4b6eed39---15769544661.pdf
    • http://hydrogears.com/survey/userfiles/files/67154912017.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c338b43982d---86196846654.pdf
    • http://cherryontop.pl/upload/fotki/file/putizosifopejagomila.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160afb9f17138e---82698238524.pdf
    • https://atcotourismtravel.com/userfiles/file/jimuwapi.pdf
    • http://thelewisfamilyreunion.com/clients/c/ce/ce72a6ed4f7059d305e3bbfb121cee90/File/xuvunivaju.pdf
    • http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/saxusamapebetezetevu.pdf
    • https://agatanorek.com/files/file/jokarudo.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/9bf09c08c1e4aceeea7dc00e869ed805/14098692575.pdf
    • https://peilimineko.com/userfiles/file/66466288337.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d728fa62b0b---veborokitibupife.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9628b786bb---xejakaniseniporute.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcd2.bin
6a0f86bc22458c289973bd35f28cf27ce4ca4fc0a746b51228d7d6a325c5b2b4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD2 10452 bytes
font_01_sfnt_off000114c4.bin
622e5ee679c46241e2afdf0596e86389035cd2b36baf8af0d84ff0fd5de6f536
pdf-font-stream PDF embedded font (sfnt) at offset 0x114C4 16800 bytes
font_02_sfnt_off0001407a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1407A 16792 bytes