Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ea1068e27e4e4a8…

MALICIOUS

PDF

87.7 KB Created: 2021-09-02 08:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0779dcb0902609d2900df17980efca70 SHA-1: a195f0fd587201c0d60e17d893757bbfc6a92123 SHA-256: 9ea1068e27e4e4a83eed6ccf79f750fd3e1d3540db314ff45eb06ea2b66d698f
156 Risk Score

Malware Insights

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

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, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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
  • 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 http://ibiforstarlight.org/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/vofugeju.pdf In PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/e4e0d412524e37bede4e5cc60fbceeb2/sokagede.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160f6fbe9eea3b---31964858667.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cec6a27991---dolazemavasapajad.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/5457003e6a7f5197fa070d487e09b3c0/97040173837.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/cef4f1716568bff5cba123393e09fc58/21746544483.pdfIn PDF document text
    • http://culbertsonlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/26031502660.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/xapalapofavasizubebagopun.pdfIn PDF document text
    • https://horgaszvelem.hu/ckfinder/userfiles/files/43072324698.pdfIn PDF document text
    • http://snsi.jp/image/news_file/36267222545.pdfIn PDF document text
    • http://kassa.pl/userfiles/file/xosamovotanevoniniwuko.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/bepewaba.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f5111c373---85692180496.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a9db86471ed---zipogotemuwem.pdfIn PDF document text
    • http://www.leasebridge.com/CKUPimg/files/31770691916.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/pumafimudepirafawezuxo.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/qdinvcejk8l20c38q1j9h2sqm3/57134374630.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/vutiwidiwogisajifuvenigon.pdfIn PDF document text
    • http://smart-ventures.ch/upload/Editor_Images/files/sagutunigavigawebi.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/80370234856.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a78b4ed9b9e---fekeka.pdfIn PDF document text
    • http://short-story.ru/upload/file/bofaxalexizapopet.pdfIn PDF document text
    • http://nusratali.com/userfiles/files/73506779543.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796dc09a291---safadotazefipixulumiv.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087e426bb03d---64251457044.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=3+ingredient+cold+appetizersPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A55 10824 bytes
SHA-256: 5da8c6b20843c63cc2b5af4c4df5763b6ea925b32b58cbdd465a98ba78a8d1f3
font_02_sfnt_off00012332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12332 17676 bytes
SHA-256: 7cfa0f630c7502b7bd7a99ee1ea8c8a04d0fc3430ebe82792d84b3bea114d38a