Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec698b39d9c619a…

MALICIOUS

PDF

83.2 KB Created: 2021-06-30 07:12:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 94f66d828fdae821b2798dfe4f69dcbe SHA-1: 54737e8fdd0b0f93e1689c259c60074e51306547 SHA-256: 3ec698b39d9c619af31bb01a7395593b04ff53463b21f1f7a4a3640e393f0058
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites and other domains, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. While no scripts were explicitly extracted, the structure and URL patterns suggest an attempt to lure users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

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://cructi.ru/uplcv?utm_term=wirehaired+german+pointer PDF link annotation
    • http://uptownherndon.com/uploads/files/fegom.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/fbb3cc52ddba7d2d69564506eb6c660e/suzakekomazenalotuma.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd7f3033e7---37947188077.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/c16b7585de2acc9f8223998579042d8c/33474067629.pdfIn PDF document text
    • https://datajournonepal.org/files/50106113863.pdfIn PDF document text
    • http://artkulinaria.pl/sites/default/files/file/gawavebadibisud.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/22986672505.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/71729510908.pdfIn PDF document text
    • http://fitviewer.de/files/file/21584797979.pdfIn PDF document text
    • https://silky.ae/images/bulk_images/files/jizodasizedopemirabik.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/245a53b22e246a3799987fe77cc8f0e8/55941892437.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/8f654e30c630ba1e515549409c4287e8/vorasutelodigewu.pdfIn PDF document text
    • http://drive4smilesontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/1898843507.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/57313606255.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2322f2d199---20764615016.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffb5500e53---8111433321.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/ni5eisluj3eglcoui4vrubl4a5/48818804758.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ede33d36c---61924029724.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/52807fe1c184f9b5cc026f05eaf6d4c5/97964094827.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c461990c1---81015989467.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/gmabbhd4t1vptbfgvkt70rc750/kexubofejaxaka.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/50136381317.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/8ea807aaf11ea56e52b1c8fe569c213d/kujerasoropoxuwafinupati.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/81167186256.pdfIn PDF document text
    • http://blbr365.com/userfiles/file/1621462232.pdfIn PDF document text
    • 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_off0000fe73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE73 17452 bytes
SHA-256: 6846050d612a4fab175f7631f444803f5cf1422812c466f10b938f76d76cd0f8
font_01_sfnt_off00012c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C16 10616 bytes
SHA-256: feb700cb4ae5f6e2a6f4ab9b60401a67e98f4f7e61ff95c539cb29ea7b0c83a5