Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c0aeca120206439…

MALICIOUS

PDF

78.0 KB Created: 2021-06-29 22:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6d7565d50c18bf1d47a91771b2d72370 SHA-1: abc73096e684b93ad295195f875edb3f2b947f40 SHA-256: 0c0aeca1202064390aea157a9c5cf06ae7bd38261e30a57bce47897370302389
124 Risk Score

Malware Insights

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

The PDF file was detected by ClamAV as a phishing trojan. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites. These sites host further PDF files, suggesting a multi-stage download or redirection chain designed to deliver a malicious payload. The presence of multiple compromised CMS upload links indicates a common technique for distributing malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4581

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://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/e6gm6uk764n5u3bf68t39hmsd2/60847067013.pdf In PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc60511677e---31063075302.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b82d8aa13a---jabelusaroleromo.pdfIn PDF document text
    • http://kaztelcom.kz/ckfinder/userfiles/files/96549213011.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2f6e24220---duzegoxed.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608af4038892c---zojadijulenakogi.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16094944cafe78---41471151963.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609e55bc95308---32172467845.pdfIn PDF document text
    • http://macphersonproperties.com/clients/876251/File/57160185668.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/6010cc6968d074b8a57552168804655f/limizimimuvo.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608b670275def---poranuzofuxurupojavoj.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a9fcbaadd---zegagopajivu.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/db92e539576ac2f55777666afda9b374/57196891836.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160c90d102c9f8---jewef.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/94350829340.pdfIn PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20210617_9F398F584CE03774.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/i36aq0r7k8a0m5cuo6oesqlg2m/52278345527.pdfIn PDF document text
    • https://activepymes.com/pub/file/safazeritivusip.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160809e16b98fd---84718839781.pdfIn PDF document text
    • https://cecprint.com/images/file/89724881631.pdfIn PDF document text
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/42786764672.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fdeeb5b80---rapomejaw.pdfIn PDF document text
    • http://vksraja.in/fckeditor/upload/file/47287103895.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607f16caa4584---raxibiten.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/57647412436.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095efa88e00b---50349379657.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=after+effects+text+transitions+freePDF 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_off0000f64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64E 10368 bytes
SHA-256: 43a5cf6c85a92a30cb2a776c21e6e741039182c8a1a5319a935277fd23821d12
font_01_sfnt_off00010df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF0 18464 bytes
SHA-256: 1b10ccacc60924c6b68d3fe8b5b99aaf1a851cc71324094d854e0ab5d383333b

Open this report in the interactive analyzer, or submit your own file for analysis.